diff --git a/src/wikiq/__init__.py b/src/wikiq/__init__.py
index c3d01cb..d9d9cc2 100755
--- a/src/wikiq/__init__.py
+++ b/src/wikiq/__init__.py
@@ -30,14 +30,7 @@ import wikiq.tables as tables
 from wikiq.tables import RevisionTable
 from wikiq.wiki_diff_matcher import WikiDiffMatcher
 from wikiq.wikitext_parser import WikitextParser
-from wikiq.resume import (
-    get_checkpoint_path,
-    read_checkpoint,
-    get_resume_point,
-    setup_resume_temp_output,
-    finalize_resume_merge,
-    cleanup_interrupted_resume,
-)
+from wikiq.resume import get_resume_point
 
 TO_ENCODE = ("title", "editor")
 PERSISTENCE_RADIUS = 7
@@ -46,7 +39,6 @@ from pathlib import Path
 
 import pyarrow as pa
 import pyarrow.csv as pacsv
-import pyarrow.parquet as pq
 from deltas import SegmentMatcher, SequenceMatcher
 
 
@@ -518,26 +510,21 @@ class WikiqParser:
         revert_radius: int = 15,
         output_jsonl: bool = False,
         output_jsonl_dir: bool = False,
-        output_parquet: bool = False,
         batch_size: int = 1024,
-        resume_point: Union[tuple, dict, None] = None,
-        partition_namespaces: bool = False,
+        resume_point: Union[tuple, None] = None,
         external_links: bool = False,
         citations: bool = False,
         wikilinks: bool = False,
         templates: bool = False,
         headings: bool = False,
         time_limit_seconds: Union[float, None] = None,
-        max_revisions_per_file: int = 0,
         input_filename: Union[str, None] = None,
     ):
         """
         Parameters:
            persist : what persistence method to use. Takes a PersistMethod value
-           resume_point : if set, either a (pageid, revid) tuple for single-file output,
-                          or a dict mapping namespace -> (pageid, revid) for partitioned output.
-                          For single-file: skip all revisions up to and including this point.
-           max_revisions_per_file : if > 0, close and rotate output files after this many revisions
+           resume_point : if set, a (pageid, revid) tuple; skip all revisions up
+                          to and including this point.
            input_filename : original input filename (needed for .jsonl.d output to derive output filename)
         """
         self.input_file = input_file
@@ -549,7 +536,6 @@ class WikiqParser:
         self.revert_radius = revert_radius
         self.diff = diff
         self.text = text
-        self.partition_namespaces = partition_namespaces
         self.resume_point = resume_point
         self.external_links = external_links
         self.citations = citations
@@ -558,7 +544,6 @@ class WikiqParser:
         self.headings = headings
         self.shutdown_requested = False
         self.time_limit_seconds = time_limit_seconds
-        self.max_revisions_per_file = max_revisions_per_file
         if namespaces is not None:
             self.namespace_filter = set(namespaces)
         else:
@@ -576,13 +561,9 @@ class WikiqParser:
         self.batch_size = batch_size
         self.output_jsonl = output_jsonl
         self.output_jsonl_dir = output_jsonl_dir
-        self.output_parquet = output_parquet
         self.output_file = output_file
 
-        if output_parquet:
-            self.pq_writer = None
-            self.parquet_buffer = []
-        elif output_jsonl:
+        if output_jsonl:
             pass  # JSONLWriter created in process()
         else:
             # TSV output
@@ -592,10 +573,6 @@ class WikiqParser:
             else:
                 self.output_file = open(output_file, "wb")
 
-        # Checkpoint for tracking resume point (path only, no open file handle for NFS safety)
-        self.checkpoint_path = None
-        self.checkpoint_state = {}  # namespace -> (pageid, revid) or None -> (pageid, revid)
-
     def request_shutdown(self):
         """Request graceful shutdown. The process() method will exit after completing the current batch."""
         self.shutdown_requested = True
@@ -620,76 +597,6 @@ class WikiqParser:
         if timer is not None:
             timer.cancel()
 
-    def _get_part_path(self, base_path, part_num):
-        """Generate path with part number inserted before extension.
-
-        Example: output.parquet -> output.part0.parquet
-        """
-        path = Path(base_path)
-        return path.parent / f"{path.stem}.part{part_num}{path.suffix}"
-
-    def _open_checkpoint(self, output_file):
-        """Enable checkpointing for Parquet output only.
-
-        JSONL doesn't need checkpoint files - resume point is derived from last line.
-        """
-        if not self.output_parquet or output_file == sys.stdout.buffer:
-            return
-        self.checkpoint_path = get_checkpoint_path(output_file, self.partition_namespaces)
-        Path(self.checkpoint_path).parent.mkdir(parents=True, exist_ok=True)
-        print(f"Checkpoint enabled: {self.checkpoint_path}", file=sys.stderr)
-
-    def _update_checkpoint(self, pageid, revid, namespace=None, part=0):
-        """Update checkpoint state and write atomically (NFS-safe)."""
-        if self.checkpoint_path is None:
-            return
-        if self.partition_namespaces:
-            self.checkpoint_state[namespace] = {"pageid": pageid, "revid": revid, "part": part}
-        else:
-            self.checkpoint_state = {"pageid": pageid, "revid": revid, "part": part}
-        # Atomic write: write to temp file, then rename
-        temp_path = self.checkpoint_path + ".tmp"
-        with open(temp_path, 'w') as f:
-            json.dump(self.checkpoint_state, f)
-        os.replace(temp_path, self.checkpoint_path)
-
-    def _close_checkpoint(self, delete=False):
-        """Clean up checkpoint, optionally deleting it."""
-        if self.checkpoint_path is None:
-            return
-        if delete and os.path.exists(self.checkpoint_path):
-            os.remove(self.checkpoint_path)
-            print(f"Checkpoint deleted: {self.checkpoint_path}", file=sys.stderr)
-        elif os.path.exists(self.checkpoint_path):
-            print(f"Checkpoint preserved for resume: {self.checkpoint_path}", file=sys.stderr)
-        # Clean up any leftover temp file
-        temp_path = self.checkpoint_path + ".tmp"
-        if os.path.exists(temp_path):
-            os.remove(temp_path)
-
-    def _write_batch(self, row_buffer, schema, writer, pq_writers, ns_base_paths, sorting_cols, namespace=None, part_numbers=None):
-        """Write a batch of rows to the appropriate writer.
-
-        For partitioned output, creates writer lazily if needed.
-        Returns (writer, num_rows) - writer used and number of rows written.
-        """
-        num_rows = len(row_buffer.get("revid", []))
-        if self.partition_namespaces and namespace is not None:
-            if namespace not in pq_writers:
-                base_path = ns_base_paths[namespace]
-                part_num = part_numbers.get(namespace, 0) if part_numbers else 0
-                if self.max_revisions_per_file > 0:
-                    ns_path = self._get_part_path(base_path, part_num)
-                else:
-                    ns_path = base_path
-                Path(ns_path).parent.mkdir(exist_ok=True, parents=True)
-                pq_writers[namespace] = pq.ParquetWriter(
-                    ns_path, schema, flavor="spark", sorting_columns=sorting_cols
-                )
-            writer = pq_writers[namespace]
-        writer.write(pa.record_batch(row_buffer, schema=schema))
-        return writer, num_rows
-
     def make_matchmake_pairs(self, patterns, labels) -> list[RegexPair]:
         if (patterns is not None and labels is not None) and (
             len(patterns) == len(labels)
@@ -747,26 +654,7 @@ class WikiqParser:
         time_limit_timer = self._start_time_limit_timer()
 
         # Track whether we've passed the resume point
-        if self.resume_point is None:
-            found_resume_point = True
-        elif self.partition_namespaces:
-            found_resume_point = {}
-        else:
-            found_resume_point = False
-
-        # When resuming with parquet, write new data to temp file/directory and merge at the end
-        original_output_file = None
-        temp_output_file = None
-        original_partition_dir = None
-        if self.resume_point is not None and self.output_parquet:
-            original_output_file, temp_output_file, original_partition_dir = \
-                setup_resume_temp_output(self.output_file, self.partition_namespaces)
-            if temp_output_file is not None:
-                self.output_file = temp_output_file
-
-        # Open checkpoint file for tracking resume point
-        checkpoint_output = original_output_file if original_output_file else self.output_file
-        self._open_checkpoint(checkpoint_output)
+        found_resume_point = self.resume_point is None
 
         # Construct dump file iterator
         dump = WikiqIterator(self.input_file, collapse_user=self.collapse_user)
@@ -804,48 +692,8 @@ class WikiqParser:
 
         # Initialize writer
         writer = None
-        sorting_cols = None
-        ns_base_paths = {}
-        pq_writers = {}
-        part_numbers = {}
 
-        if self.output_parquet:
-            pageid_sortingcol = pq.SortingColumn(schema.get_field_index("articleid"))
-            revid_sortingcol = pq.SortingColumn(schema.get_field_index("revid"))
-            sorting_cols = [pageid_sortingcol, revid_sortingcol]
-
-            if self.resume_point is not None:
-                if self.partition_namespaces:
-                    for ns, resume_data in self.resume_point.items():
-                        part_numbers[ns] = resume_data[2] if len(resume_data) > 2 else 0
-                else:
-                    part_numbers[None] = self.resume_point[2] if len(self.resume_point) > 2 else 0
-
-            if not self.partition_namespaces:
-                if self.max_revisions_per_file > 0:
-                    output_path_with_part = self._get_part_path(self.output_file, part_numbers.get(None, 0))
-                else:
-                    output_path_with_part = self.output_file
-                writer = pq.ParquetWriter(
-                    output_path_with_part,
-                    schema,
-                    flavor="spark",
-                    sorting_columns=sorting_cols,
-                )
-            else:
-                output_path = Path(self.output_file)
-                if self.namespace_filter is not None:
-                    namespaces = self.namespace_filter
-                else:
-                    namespaces = self.namespaces.values()
-                ns_base_paths = {
-                    ns: (output_path.parent / f"namespace={ns}") / output_path.name
-                    for ns in namespaces
-                }
-                for ns in namespaces:
-                    if ns not in part_numbers:
-                        part_numbers[ns] = 0
-        elif self.output_jsonl:
+        if self.output_jsonl:
             append_mode = self.resume_point is not None
             if self.output_jsonl_dir:
                 # Create directory for JSONL output
@@ -891,34 +739,16 @@ class WikiqParser:
         # Write buffer: accumulate rows before flushing
         write_buffer = defaultdict(list)
         buffer_count = 0
-        last_namespace = None
 
         def flush_buffer():
-            nonlocal write_buffer, buffer_count, last_namespace
+            nonlocal write_buffer, buffer_count
             if buffer_count == 0:
                 return
             row_buffer = dict(write_buffer)
-            namespace = last_namespace
-            if self.output_parquet:
-                if self.partition_namespaces:
-                    self._write_batch(
-                        row_buffer, schema, writer, pq_writers, ns_base_paths,
-                        sorting_cols, namespace=namespace, part_numbers=part_numbers
-                    )
-                else:
-                    writer.write(pa.record_batch(row_buffer, schema=schema))
-            elif self.output_jsonl:
+            if self.output_jsonl:
                 writer.write_batch(row_buffer)
             else:
                 writer.write(pa.record_batch(row_buffer, schema=schema))
-
-            # Update checkpoint
-            last_pageid = row_buffer["articleid"][-1]
-            last_revid = row_buffer["revid"][-1]
-            part = part_numbers.get(namespace if self.partition_namespaces else None, 0)
-            self._update_checkpoint(last_pageid, last_revid,
-                                    namespace=namespace if self.partition_namespaces else None,
-                                    part=part)
             write_buffer = defaultdict(list)
             buffer_count = 0
 
@@ -1103,7 +933,6 @@ class WikiqParser:
                         for k, v in oldest_row.items():
                             write_buffer[k].append(v)
                         buffer_count += 1
-                        last_namespace = page.mwpage.namespace
 
                         if buffer_count >= self.batch_size:
                             flush_buffer()
@@ -1120,7 +949,6 @@ class WikiqParser:
                     for k, v in row.items():
                         write_buffer[k].append(v)
                     buffer_count += 1
-                    last_namespace = page.mwpage.namespace
 
                     if buffer_count >= self.batch_size:
                         flush_buffer()
@@ -1146,7 +974,6 @@ class WikiqParser:
                     for k, v in pending_row.items():
                         write_buffer[k].append(v)
                     buffer_count += 1
-                    last_namespace = page.mwpage.namespace
 
             if self.shutdown_requested:
                 break
@@ -1170,24 +997,9 @@ class WikiqParser:
         )
 
         # Close all writers
-        if self.output_parquet and self.partition_namespaces:
-            for pq_writer in pq_writers.values():
-                pq_writer.close()
-        elif writer is not None:
+        if writer is not None:
             writer.close()
 
-        # Close checkpoint file; delete it only if we completed without interruption
-        self._close_checkpoint(delete=not self.shutdown_requested)
-
-        # Merge temp output with original for parquet resume
-        if original_output_file is not None and temp_output_file is not None:
-            finalize_resume_merge(
-                original_output_file,
-                temp_output_file,
-                self.partition_namespaces,
-                original_partition_dir
-            )
-
 def match_archive_suffix(input_filename):
     if re.match(r".*\.7z$", input_filename):
         cmd = ["7za", "x", "-so", input_filename]
@@ -1215,14 +1027,12 @@ def get_output_filename(input_filename, output_format='tsv') -> str:
 
     Args:
         input_filename: Input dump file path
-        output_format: 'tsv', 'jsonl', or 'parquet'
+        output_format: 'tsv' or 'jsonl'
     """
     output_filename = re.sub(r"\.(7z|gz|bz2)?$", "", input_filename)
     output_filename = re.sub(r"\.xml", "", output_filename)
     if output_format == 'jsonl':
         output_filename = output_filename + ".jsonl"
-    elif output_format == 'parquet':
-        output_filename = output_filename + ".parquet"
     else:
         output_filename = output_filename + ".tsv"
     return output_filename
@@ -1249,7 +1059,7 @@ def main():
         dest="output",
         type=str,
         nargs=1,
-        help="Output file or directory. Format is detected from extension: .jsonl for JSONL, .parquet for Parquet, otherwise TSV.",
+        help="Output file or directory. Format is detected from extension: .jsonl for JSONL, otherwise TSV.",
     )
 
     parser.add_argument(
@@ -1415,7 +1225,7 @@ def main():
         dest="batch_size",
         default=1500,
         type=int,
-        help="How many revisions to process in each batch. This ends up being the Parquet row group size",
+        help="How many revisions to process in each batch.",
     )
 
     parser.add_argument(
@@ -1433,22 +1243,6 @@ def main():
         help="Time limit in hours before graceful shutdown. Set to 0 to disable (default).",
     )
 
-    parser.add_argument(
-        "--partition-namespaces",
-        dest="partition_namespaces",
-        action="store_true",
-        default=False,
-        help="For Parquet output, partition output by namespace into separate files.",
-    )
-
-    parser.add_argument(
-        "--max-revisions-per-file",
-        dest="max_revisions_per_file",
-        type=int,
-        default=0,
-        help="For Parquet output, split output into multiple files after this many revisions. Set to 0 to disable (default).",
-    )
-
     args = parser.parse_args()
 
     # set persistence method
@@ -1508,13 +1302,11 @@ def main():
             # Detect output format from extension
             output_jsonl_dir = output.endswith(".jsonl.d")
             output_jsonl = output.endswith(".jsonl") or output_jsonl_dir
-            output_parquet = output.endswith(".parquet")
-            partition_namespaces = args.partition_namespaces and output_parquet
 
             if args.stdout:
                 output_file = sys.stdout.buffer
-            elif output_jsonl or output_parquet:
-                # Output is a JSONL or Parquet file path - use it directly
+            elif output_jsonl:
+                # Output is a JSONL file path - use it directly
                 output_file = output
             elif os.path.isdir(output):
                 # Output is a directory - derive filename from input
@@ -1526,25 +1318,14 @@ def main():
             # Handle resume functionality before opening input file
             resume_point = None
             if args.resume:
-                if (output_jsonl or output_parquet) and not args.stdout:
-                    # Clean up any interrupted resume from previous run
-                    if output_parquet:
-                        cleanup_result = cleanup_interrupted_resume(output_file, partition_namespaces)
-                        if cleanup_result == "start_fresh":
-                            resume_point = None
-                        else:
-                            resume_point = get_resume_point(output_file, partition_namespaces)
-                    else:
-                        # JSONL: get resume point from last line of file (no checkpoint)
-                        resume_point = get_resume_point(output_file, input_file=filename)
+                if output_jsonl and not args.stdout:
+                    # JSONL: get resume point from last line of file
+                    resume_point = get_resume_point(output_file, input_file=filename)
                     if resume_point is not None:
-                        if isinstance(resume_point, dict):
-                            print(f"Resuming from checkpoint for {len(resume_point)} namespaces", file=sys.stderr)
-                        else:
-                            pageid, revid = resume_point[0], resume_point[1]
-                            print(f"Resuming from checkpoint: pageid={pageid}, revid={revid}", file=sys.stderr)
+                        pageid, revid = resume_point[0], resume_point[1]
+                        print(f"Resuming from: pageid={pageid}, revid={revid}", file=sys.stderr)
                 else:
-                    sys.exit("Error: --resume only works with JSONL or Parquet output (not stdout or TSV)")
+                    sys.exit("Error: --resume only works with JSONL output (not stdout or TSV)")
 
             # Now open the input file
             print("Processing file: %s" % filename, file=sys.stderr)
@@ -1567,8 +1348,6 @@ def main():
                 diff=args.diff,
                 output_jsonl=output_jsonl,
                 output_jsonl_dir=output_jsonl_dir,
-                output_parquet=output_parquet,
-                partition_namespaces=partition_namespaces,
                 batch_size=args.batch_size,
                 resume_point=resume_point,
                 external_links=args.external_links,
@@ -1577,7 +1356,6 @@ def main():
                 templates=args.templates,
                 headings=args.headings,
                 time_limit_seconds=time_limit_seconds,
-                max_revisions_per_file=args.max_revisions_per_file,
                 input_filename=filename,
             )
 
diff --git a/src/wikiq/resume.py b/src/wikiq/resume.py
index dc3513c..1b3f602 100644
--- a/src/wikiq/resume.py
+++ b/src/wikiq/resume.py
@@ -1,10 +1,8 @@
 """
-Checkpoint and resume functionality for wikiq output.
+Resume functionality for wikiq JSONL output.
 
-This module handles:
-- Finding resume points in existing output (JSONL or Parquet)
-- Merging resumed data with existing output (for Parquet, streaming, memory-efficient)
-- Checkpoint file management for fast resume point lookup
+The resume point is derived from the last complete line of the existing
+output file, so no separate checkpoint files are needed.
 """
 
 import json
@@ -12,147 +10,6 @@ import os
 import sys
 from collections import deque
 
-import pyarrow.parquet as pq
-
-
-def get_checkpoint_path(output_file, partition_namespaces=False):
-    """Get the path to the checkpoint file for a given output file.
-
-    For partitioned output, the checkpoint is placed outside the partition directory
-    to avoid pyarrow trying to read it as a parquet file. The filename includes
-    the output filename to keep it unique per input file (for parallel jobs).
-    """
-    if partition_namespaces:
-        partition_dir = os.path.dirname(output_file)
-        output_filename = os.path.basename(output_file)
-        parent_dir = os.path.dirname(partition_dir)
-        return os.path.join(parent_dir, output_filename + ".checkpoint")
-    return str(output_file) + ".checkpoint"
-
-
-def read_checkpoint(checkpoint_path, partition_namespaces=False):
-    """
-    Read resume point from checkpoint file if it exists.
-
-    Checkpoint format:
-        Single file: {"pageid": 54, "revid": 325} or {"pageid": 54, "revid": 325, "part": 2}
-        Partitioned: {"0": {"pageid": 54, "revid": 325, "part": 1}, ...}
-
-    Returns:
-        For single files: A tuple (pageid, revid) or (pageid, revid, part), or None if not found.
-        For partitioned: A dict mapping namespace -> (pageid, revid, part), or None.
-    """
-    if not os.path.exists(checkpoint_path):
-        return None
-
-    try:
-        with open(checkpoint_path, 'r') as f:
-            data = json.load(f)
-
-        if not data:
-            return None
-
-        # Single-file format: {"pageid": ..., "revid": ..., "part": ...}
-        if "pageid" in data and "revid" in data:
-            part = data.get("part", 0)
-            if part > 0:
-                return (data["pageid"], data["revid"], part)
-            return (data["pageid"], data["revid"])
-
-        # Partitioned format: {"0": {"pageid": ..., "revid": ..., "part": ...}, ...}
-        result = {}
-        for key, value in data.items():
-            part = value.get("part", 0)
-            result[int(key)] = (value["pageid"], value["revid"], part)
-
-        return result if result else None
-
-    except (json.JSONDecodeError, IOError, KeyError, TypeError) as e:
-        print(f"Warning: Could not read checkpoint file {checkpoint_path}: {e}", file=sys.stderr)
-        return None
-
-
-def cleanup_interrupted_resume(output_file, partition_namespaces):
-    """
-    Merge any leftover .resume_temp files from a previous interrupted run.
-
-    This should be called BEFORE get_resume_point() so the resume point
-    is calculated from the merged data.
-
-    Returns:
-        None - no temp files found or normal merge completed
-        "start_fresh" - both original and temp were corrupted and deleted
-    """
-    import shutil
-
-    if partition_namespaces:
-        partition_dir = os.path.dirname(output_file)
-        output_filename = os.path.basename(output_file)
-        temp_suffix = ".resume_temp"
-
-        if not os.path.isdir(partition_dir):
-            return
-
-        has_old_temp_files = False
-        for ns_dir in os.listdir(partition_dir):
-            if ns_dir.startswith('namespace='):
-                temp_path = os.path.join(partition_dir, ns_dir, output_filename + temp_suffix)
-                if os.path.exists(temp_path):
-                    has_old_temp_files = True
-                    break
-
-        if has_old_temp_files:
-            print(f"Found leftover temp files in {partition_dir} from previous interrupted partitioned run, merging first...", file=sys.stderr)
-            had_corruption = merge_partitioned_namespaces(partition_dir, temp_suffix, output_filename)
-
-            has_valid_data = False
-            for ns_dir in os.listdir(partition_dir):
-                if ns_dir.startswith('namespace='):
-                    ns_path = os.path.join(partition_dir, ns_dir)
-                    parquet_files = [f for f in os.listdir(ns_path) if f.endswith('.parquet') and not f.endswith('.resume_temp')]
-                    if parquet_files:
-                        has_valid_data = True
-                        break
-
-            if had_corruption and not has_valid_data:
-                checkpoint_path = get_checkpoint_path(output_file, partition_namespaces)
-                if os.path.exists(checkpoint_path):
-                    os.remove(checkpoint_path)
-                print("All partitioned files were corrupted, will start fresh.", file=sys.stderr)
-                return "start_fresh"
-
-            print("Previous temp files merged successfully.", file=sys.stderr)
-    else:
-        temp_output_file = output_file + ".resume_temp"
-        if os.path.exists(temp_output_file) and not os.path.isdir(temp_output_file):
-            print(f"Found leftover temp file {temp_output_file} from previous interrupted run, merging first...", file=sys.stderr)
-            merged_path = output_file + ".merged"
-            merged = merge_parquet_files(output_file, temp_output_file, merged_path)
-            if merged == "original_only":
-                os.remove(temp_output_file)
-            elif merged == "temp_only":
-                if os.path.exists(output_file):
-                    os.remove(output_file)
-                os.rename(temp_output_file, output_file)
-                print("Recovered from temp file (original was corrupted or missing).", file=sys.stderr)
-            elif merged == "both_invalid":
-                if os.path.exists(output_file):
-                    os.remove(output_file)
-                if os.path.exists(temp_output_file):
-                    os.remove(temp_output_file)
-                checkpoint_path = get_checkpoint_path(output_file, partition_namespaces)
-                if os.path.exists(checkpoint_path):
-                    os.remove(checkpoint_path)
-                print("Both files were corrupted, will start fresh.", file=sys.stderr)
-                return "start_fresh"
-            elif merged == "merged":
-                os.remove(output_file)
-                os.rename(merged_path, output_file)
-                os.remove(temp_output_file)
-                print("Previous temp file merged successfully.", file=sys.stderr)
-            else:
-                os.remove(temp_output_file)
-
 
 def get_jsonl_resume_point(output_file, input_file=None):
     """Get resume point from last complete line of JSONL file.
@@ -207,325 +64,18 @@ def get_jsonl_resume_point(output_file, input_file=None):
         return None
 
 
-def get_resume_point(output_file, partition_namespaces=False, input_file=None):
+def get_resume_point(output_file, input_file=None):
     """
-    Find the resume point(s) from existing output.
-
-    For JSONL: reads last line of file (no checkpoint needed).
-    For Parquet: checks checkpoint file, falls back to scanning parquet.
+    Find the resume point from existing JSONL output.
 
     Args:
         output_file: Path to the output file.
-        partition_namespaces: Whether the output uses namespace partitioning.
         input_file: Path to input file (needed for .jsonl.d directory output).
 
     Returns:
-        For single files: A tuple (pageid, revid) or (pageid, revid, part), or None.
-        For partitioned: A dict mapping namespace -> (pageid, revid, part), or None.
+        A (pageid, revid) tuple, or None.
     """
-    # For JSONL, read resume point directly from last line (no checkpoint needed)
-    if output_file.endswith('.jsonl') or output_file.endswith('.jsonl.d'):
-        result = get_jsonl_resume_point(output_file, input_file)
-        if result:
-            print(f"Resume point found from JSONL: pageid={result[0]}, revid={result[1]}", file=sys.stderr)
-        return result
-
-    # For Parquet, use checkpoint file (fast)
-    checkpoint_path = get_checkpoint_path(output_file, partition_namespaces)
-    checkpoint_result = read_checkpoint(checkpoint_path, partition_namespaces)
-    if checkpoint_result is not None:
-        print(f"Resume point found in checkpoint file {checkpoint_path}", file=sys.stderr)
-        return checkpoint_result
-
-    # Fall back to scanning parquet (slow, for backwards compatibility)
-    print(f"No checkpoint file found at {checkpoint_path}, scanning parquet output...", file=sys.stderr)
-    try:
-        if partition_namespaces:
-            return _get_resume_point_partitioned(output_file)
-        else:
-            return _get_resume_point_single_file(output_file)
-    except Exception as e:
-        print(f"Error reading resume point from {output_file}: {e}", file=sys.stderr)
-        return None
-
-
-def _get_last_row_resume_point(pq_path):
-    """Get resume point by reading only the last row group of a parquet file."""
-    pf = pq.ParquetFile(pq_path)
-    if pf.metadata.num_row_groups == 0:
-        return None
-
-    last_rg_idx = pf.metadata.num_row_groups - 1
-    table = pf.read_row_group(last_rg_idx, columns=['articleid', 'revid'])
-    if table.num_rows == 0:
-        return None
-
-    max_pageid = table['articleid'][-1].as_py()
-    max_revid = table['revid'][-1].as_py()
-    return (max_pageid, max_revid, 0)
-
-
-def _get_resume_point_partitioned(output_file):
-    """Find per-namespace resume points from partitioned output."""
-    partition_dir = os.path.dirname(output_file)
-    output_filename = os.path.basename(output_file)
-
-    if not os.path.exists(partition_dir) or not os.path.isdir(partition_dir):
-        return None
-
-    namespace_dirs = [d for d in os.listdir(partition_dir) if d.startswith('namespace=')]
-    if not namespace_dirs:
-        return None
-
-    resume_points = {}
-    for ns_dir in namespace_dirs:
-        ns = int(ns_dir.split('=')[1])
-        pq_path = os.path.join(partition_dir, ns_dir, output_filename)
-
-        if not os.path.exists(pq_path):
-            continue
-
-        try:
-            result = _get_last_row_resume_point(pq_path)
-            if result is not None:
-                resume_points[ns] = result
-        except Exception as e:
-            print(f"Warning: Could not read {pq_path}: {e}", file=sys.stderr)
-            continue
-
-    return resume_points if resume_points else None
-
-
-def _get_resume_point_single_file(output_file):
-    """Find resume point from a single parquet file."""
-    if not os.path.exists(output_file):
-        return None
-
-    if os.path.isdir(output_file):
-        return None
-
-    return _get_last_row_resume_point(output_file)
-
-
-def merge_parquet_files(original_path, temp_path, merged_path):
-    """
-    Merge two parquet files by streaming row groups.
-
-    Returns:
-        "merged" - merged file was created from both sources
-        "original_only" - temp was invalid, keep original unchanged
-        "temp_only" - original was corrupted but temp is valid
-        "both_invalid" - both files invalid
-        False - both files were valid but empty
-    """
-    original_valid = False
-    temp_valid = False
-    original_pq = None
-    temp_pq = None
-
-    try:
-        original_pq = pq.ParquetFile(original_path)
-        original_valid = True
-    except Exception as e:
-        print(f"Warning: Original file {original_path} is corrupted or invalid: {e}", file=sys.stderr)
-
-    try:
-        if not os.path.exists(temp_path):
-            print(f"Note: Temp file {temp_path} does not exist", file=sys.stderr)
-        else:
-            temp_pq = pq.ParquetFile(temp_path)
-            temp_valid = True
-    except Exception:
-        print(f"Note: No new data in temp file {temp_path}", file=sys.stderr)
-
-    if not original_valid and not temp_valid:
-        print(f"Both original and temp files are invalid, will start fresh", file=sys.stderr)
-        return "both_invalid"
-
-    if not original_valid and temp_valid:
-        print(f"Original file corrupted but temp file is valid, recovering from temp", file=sys.stderr)
-        return "temp_only"
-
-    if original_valid and not temp_valid:
-        return "original_only"
-
-    merged_writer = None
-
-    for i in range(original_pq.num_row_groups):
-        row_group = original_pq.read_row_group(i)
-        if merged_writer is None:
-            merged_writer = pq.ParquetWriter(
-                merged_path,
-                row_group.schema,
-                flavor="spark"
-            )
-        merged_writer.write_table(row_group)
-
-    for i in range(temp_pq.num_row_groups):
-        row_group = temp_pq.read_row_group(i)
-        if merged_writer is None:
-            merged_writer = pq.ParquetWriter(
-                merged_path,
-                row_group.schema,
-                flavor="spark"
-            )
-        merged_writer.write_table(row_group)
-
-    if merged_writer is not None:
-        merged_writer.close()
-        return "merged"
-    return False
-
-
-def merge_partitioned_namespaces(partition_dir, temp_suffix, file_filter):
-    """
-    Merge partitioned namespace directories after resume.
-
-    Returns:
-        True if at least one namespace has valid data after merge
-        False if all namespaces ended up with corrupted/deleted data
-    """
-    namespace_dirs = [d for d in os.listdir(partition_dir) if d.startswith('namespace=')]
-    had_corruption = False
-    expected_temp = file_filter + temp_suffix
-
-    for ns_dir in namespace_dirs:
-        ns_path = os.path.join(partition_dir, ns_dir)
-        temp_path = os.path.join(ns_path, expected_temp)
-
-        if not os.path.exists(temp_path):
-            continue
-
-        original_file = file_filter
-        original_path = os.path.join(ns_path, original_file)
-
-        if os.path.exists(original_path):
-            merged_path = original_path + ".merged"
-            merged = merge_parquet_files(original_path, temp_path, merged_path)
-
-            if merged == "original_only":
-                if os.path.exists(temp_path):
-                    os.remove(temp_path)
-            elif merged == "temp_only":
-                os.remove(original_path)
-                os.rename(temp_path, original_path)
-            elif merged == "both_invalid":
-                if os.path.exists(original_path):
-                    os.remove(original_path)
-                if os.path.exists(temp_path):
-                    os.remove(temp_path)
-                had_corruption = True
-            elif merged == "merged":
-                os.remove(original_path)
-                os.rename(merged_path, original_path)
-                if os.path.exists(temp_path):
-                    os.remove(temp_path)
-            else:
-                if os.path.exists(original_path):
-                    os.remove(original_path)
-                if os.path.exists(temp_path):
-                    os.remove(temp_path)
-        else:
-            try:
-                pq.ParquetFile(temp_path)
-                os.rename(temp_path, original_path)
-            except Exception:
-                if os.path.exists(temp_path):
-                    os.remove(temp_path)
-                had_corruption = True
-
-    return had_corruption
-
-
-def finalize_resume_merge(
-    original_output_file,
-    temp_output_file,
-    partition_namespaces,
-    original_partition_dir
-):
-    """
-    Finalize the resume by merging temp output with original output.
-    """
-    import shutil
-
-    print("Merging resumed data with existing output...", file=sys.stderr)
-    try:
-        if partition_namespaces and original_partition_dir is not None:
-            file_filter = os.path.basename(original_output_file)
-            merge_partitioned_namespaces(original_partition_dir, ".resume_temp", file_filter)
-            if os.path.exists(temp_output_file) and os.path.isdir(temp_output_file):
-                shutil.rmtree(temp_output_file)
-        else:
-            merged_output_file = original_output_file + ".merged"
-            merged = merge_parquet_files(original_output_file, temp_output_file, merged_output_file)
-
-            if merged == "original_only":
-                if os.path.exists(temp_output_file):
-                    os.remove(temp_output_file)
-            elif merged == "temp_only":
-                os.remove(original_output_file)
-                os.rename(temp_output_file, original_output_file)
-            elif merged == "both_invalid":
-                os.remove(original_output_file)
-                if os.path.exists(temp_output_file):
-                    os.remove(temp_output_file)
-            elif merged == "merged":
-                os.remove(original_output_file)
-                os.rename(merged_output_file, original_output_file)
-                if os.path.exists(temp_output_file):
-                    os.remove(temp_output_file)
-            else:
-                os.remove(original_output_file)
-                if os.path.exists(temp_output_file):
-                    os.remove(temp_output_file)
-
-        print("Merge complete.", file=sys.stderr)
-    except Exception as e:
-        print(f"Error merging resume data for {original_output_file}: {e}", file=sys.stderr)
-        print(f"New data saved in: {temp_output_file}", file=sys.stderr)
-        raise
-
-
-def setup_resume_temp_output(output_file, partition_namespaces):
-    """
-    Set up temp output for resume mode (Parquet only).
-
-    Returns:
-        Tuple of (original_output_file, temp_output_file, original_partition_dir)
-        or (None, None, None) if no existing output to resume from.
-    """
-    import shutil
-
-    original_output_file = None
-    temp_output_file = None
-    original_partition_dir = None
-
-    if partition_namespaces:
-        partition_dir = os.path.dirname(output_file)
-        output_filename = os.path.basename(output_file)
-        output_exists = False
-        if os.path.isdir(partition_dir):
-            for d in os.listdir(partition_dir):
-                if d.startswith('namespace='):
-                    if os.path.exists(os.path.join(partition_dir, d, output_filename)):
-                        output_exists = True
-                        break
-        if output_exists:
-            original_partition_dir = partition_dir
-    else:
-        output_exists = isinstance(output_file, str) and os.path.exists(output_file)
-
-    if output_exists:
-        original_output_file = output_file
-        temp_output_file = output_file + ".resume_temp"
-
-        if os.path.exists(temp_output_file):
-            if os.path.isdir(temp_output_file):
-                shutil.rmtree(temp_output_file)
-            else:
-                os.remove(temp_output_file)
-
-        if partition_namespaces:
-            os.makedirs(temp_output_file, exist_ok=True)
-
-    return original_output_file, temp_output_file, original_partition_dir
+    result = get_jsonl_resume_point(output_file, input_file)
+    if result:
+        print(f"Resume point found from JSONL: pageid={result[0]}, revid={result[1]}", file=sys.stderr)
+    return result
diff --git a/test/Wikiq_Unit_Test.py b/test/Wikiq_Unit_Test.py
index 4c22eb3..34b660a 100644
--- a/test/Wikiq_Unit_Test.py
+++ b/test/Wikiq_Unit_Test.py
@@ -440,7 +440,7 @@ def test_external_links_only():
     # Verify citations column does NOT exist
     assert "citations" not in test.columns, "citations column should NOT exist when only --external-links is used"
 
-    # Verify column has list/array type (pandas reads parquet lists as numpy arrays)
+    # Verify column has list/array type (pandas reads pyarrow lists as numpy arrays)
     assert test["external_links"].apply(lambda x: x is None or hasattr(x, '__len__')).all(), \
         "external_links should be a list/array type or None"
 
@@ -495,7 +495,7 @@ def test_citations_only():
     # Verify external_links column does NOT exist
     assert "external_links" not in test.columns, "external_links column should NOT exist when only --citations is used"
 
-    # Verify column has list/array type (pandas reads parquet lists as numpy arrays)
+    # Verify column has list/array type (pandas reads pyarrow lists as numpy arrays)
     assert test["citations"].apply(lambda x: x is None or hasattr(x, '__len__')).all(), \
         "citations should be a list/array type or None"
 
@@ -545,7 +545,7 @@ def test_external_links_and_citations():
     assert "external_links" in test.columns, "external_links column should exist"
     assert "citations" in test.columns, "citations column should exist"
 
-    # Verify both columns have list/array types (pandas reads parquet lists as numpy arrays)
+    # Verify both columns have list/array types (pandas reads pyarrow lists as numpy arrays)
     assert test["external_links"].apply(lambda x: x is None or hasattr(x, '__len__')).all(), \
         "external_links should be a list/array type or None"
     assert test["citations"].apply(lambda x: x is None or hasattr(x, '__len__')).all(), \
@@ -753,37 +753,4 @@ def test_headings():
     print(f"Headings test passed! {len(test)} rows processed")
 
 
-def test_parquet_output():
-    """Test that Parquet output format works correctly."""
-    tester = WikiqTester(SAILORMOON, "parquet_output", in_compression="7z", out_format="parquet")
-
-    try:
-        tester.call_wikiq("--fandom-2020")
-    except subprocess.CalledProcessError as exc:
-        pytest.fail(exc.stderr.decode("utf8"))
-
-    # Verify output file exists
-    assert os.path.exists(tester.output), f"Parquet output file should exist at {tester.output}"
-
-    # Read and verify content
-    test = pd.read_parquet(tester.output)
-
-    # Verify expected columns exist
-    assert "revid" in test.columns
-    assert "articleid" in test.columns
-    assert "title" in test.columns
-    assert "namespace" in test.columns
-
-    # Verify row count matches JSONL output
-    tester_jsonl = WikiqTester(SAILORMOON, "parquet_compare", in_compression="7z", out_format="jsonl")
-    try:
-        tester_jsonl.call_wikiq("--fandom-2020")
-    except subprocess.CalledProcessError as exc:
-        pytest.fail(exc.stderr.decode("utf8"))
-
-    test_jsonl = pd.read_json(tester_jsonl.output, lines=True)
-    assert len(test) == len(test_jsonl), f"Parquet and JSONL should have same row count: {len(test)} vs {len(test_jsonl)}"
-
-    print(f"Parquet output test passed! {len(test)} rows")
-
 
diff --git a/test/baseline_output/collapse-user_sailormoon.parquet b/test/baseline_output/collapse-user_sailormoon.parquet
deleted file mode 100644
index 0cb1db1..0000000
Binary files a/test/baseline_output/collapse-user_sailormoon.parquet and /dev/null differ
diff --git a/test/baseline_output/diff_sailormoon.parquet b/test/baseline_output/diff_sailormoon.parquet
deleted file mode 100644
index 1b14699..0000000
Binary files a/test/baseline_output/diff_sailormoon.parquet and /dev/null differ
diff --git a/test/baseline_output/text_sailormoon.parquet b/test/baseline_output/text_sailormoon.parquet
deleted file mode 100644
index a8037b1..0000000
Binary files a/test/baseline_output/text_sailormoon.parquet and /dev/null differ
diff --git a/test/test_resume.py b/test/test_resume.py
index 2684c7c..2928fba 100644
--- a/test/test_resume.py
+++ b/test/test_resume.py
@@ -9,10 +9,6 @@ import time
 
 import pytest
 
-from wikiq.resume import (
-    get_checkpoint_path,
-    read_checkpoint,
-)
 from wikiq_test_utils import (
     SAILORMOON,
     TEST_DIR,
@@ -33,7 +29,7 @@ def read_jsonl(filepath):
 
 
 def test_resume():
-    """Test that --resume properly resumes processing from the last checkpoint."""
+    """Test that --resume properly resumes processing from the last line of output."""
     import pandas as pd
     from pandas.testing import assert_frame_equal
 
@@ -57,10 +53,6 @@ def test_resume():
         for row in full_rows[:middle_idx + 1]:
             f.write(json.dumps(row) + "\n")
 
-    checkpoint_path = get_checkpoint_path(partial_output_path)
-    with open(checkpoint_path, 'w') as f:
-        json.dump({"pageid": full_rows[middle_idx]["articleid"], "revid": resume_revid}, f)
-
     try:
         tester_partial.call_wikiq("--fandom-2020", "--resume")
     except subprocess.CalledProcessError as exc:
@@ -103,10 +95,6 @@ def test_resume_with_diff():
         for row in full_rows[:resume_idx + 1]:
             f.write(json.dumps(row) + "\n")
 
-    checkpoint_path = get_checkpoint_path(partial_output_path)
-    with open(checkpoint_path, 'w') as f:
-        json.dump({"pageid": full_rows[resume_idx]["articleid"], "revid": resume_revid}, f)
-
     try:
         tester_partial.call_wikiq("--diff", "--fandom-2020", "--resume")
     except subprocess.CalledProcessError as exc:
@@ -170,10 +158,6 @@ def test_resume_simple():
         for row in full_rows[:resume_idx + 1]:
             f.write(json.dumps(row) + "\n")
 
-    checkpoint_path = get_checkpoint_path(partial_output_path)
-    with open(checkpoint_path, 'w') as f:
-        json.dump({"pageid": full_rows[resume_idx]["articleid"], "revid": resume_revid}, f)
-
     try:
         tester_partial.call_wikiq("--resume")
     except subprocess.CalledProcessError as exc:
@@ -186,39 +170,6 @@ def test_resume_simple():
     assert_frame_equal(df_full, df_resumed)
 
 
-def test_checkpoint_read():
-    """Test that read_checkpoint correctly reads checkpoint files."""
-    with tempfile.TemporaryDirectory() as tmpdir:
-        checkpoint_path = os.path.join(tmpdir, "test.jsonl.checkpoint")
-
-        # Test reading valid checkpoint
-        with open(checkpoint_path, 'w') as f:
-            json.dump({"pageid": 100, "revid": 200}, f)
-
-        result = read_checkpoint(checkpoint_path)
-        assert result == (100, 200), f"Expected (100, 200), got {result}"
-
-        # Test reading non-existent checkpoint
-        result = read_checkpoint(os.path.join(tmpdir, "nonexistent.checkpoint"))
-        assert result is None, f"Expected None for non-existent file, got {result}"
-
-        # Test reading empty checkpoint
-        empty_path = os.path.join(tmpdir, "empty.checkpoint")
-        with open(empty_path, 'w') as f:
-            f.write("{}")
-        result = read_checkpoint(empty_path)
-        assert result is None, f"Expected None for empty checkpoint, got {result}"
-
-        # Test reading corrupted checkpoint
-        corrupt_path = os.path.join(tmpdir, "corrupt.checkpoint")
-        with open(corrupt_path, 'w') as f:
-            f.write("not valid json")
-        result = read_checkpoint(corrupt_path)
-        assert result is None, f"Expected None for corrupted checkpoint, got {result}"
-
-    print("Checkpoint read test passed!")
-
-
 def test_resume_with_interruption():
     """Test that resume works correctly after interruption."""
     import pandas as pd
@@ -245,9 +196,6 @@ def test_resume_with_interruption():
     # Clean up for interrupted run
     if os.path.exists(output_file):
         os.remove(output_file)
-    checkpoint_path = get_checkpoint_path(output_file)
-    if os.path.exists(checkpoint_path):
-        os.remove(checkpoint_path)
 
     # Start wikiq and interrupt it
     cmd_partial = [
@@ -301,48 +249,6 @@ def test_resume_with_interruption():
     assert_frame_equal(df_full, df_resumed)
 
 
-def test_resume_parquet():
-    """Test that --resume works correctly with Parquet output format."""
-    import pandas as pd
-    from pandas.testing import assert_frame_equal
-    import pyarrow.parquet as pq
-
-    tester_full = WikiqTester(SAILORMOON, "resume_parquet_full", in_compression="7z", out_format="parquet")
-
-    try:
-        tester_full.call_wikiq("--fandom-2020")
-    except subprocess.CalledProcessError as exc:
-        pytest.fail(exc.stderr.decode("utf8"))
-
-    full_output_path = tester_full.output
-    full_table = pq.read_table(full_output_path)
-
-    # Use unsorted indices consistently - slice the table and get checkpoint from same position
-    resume_idx = len(full_table) // 3
-    resume_revid = int(full_table.column("revid")[resume_idx].as_py())
-    resume_pageid = int(full_table.column("articleid")[resume_idx].as_py())
-
-    tester_partial = WikiqTester(SAILORMOON, "resume_parquet_partial", in_compression="7z", out_format="parquet")
-    partial_output_path = tester_partial.output
-
-    # Write partial Parquet file using the SAME schema as the full file
-    partial_table = full_table.slice(0, resume_idx + 1)
-    pq.write_table(partial_table, partial_output_path)
-
-    checkpoint_path = get_checkpoint_path(partial_output_path)
-    with open(checkpoint_path, 'w') as f:
-        json.dump({"pageid": resume_pageid, "revid": resume_revid}, f)
-
-    try:
-        tester_partial.call_wikiq("--fandom-2020", "--resume")
-    except subprocess.CalledProcessError as exc:
-        pytest.fail(exc.stderr.decode("utf8"))
-
-    df_full = full_table.to_pandas()
-    df_resumed = pd.read_parquet(partial_output_path)
-    assert_frame_equal(df_full, df_resumed)
-
-
 def test_resume_tsv_error():
     """Test that --resume with TSV output produces a proper error message."""
     tester = WikiqTester(SAILORMOON, "resume_tsv_error", in_compression="7z", out_format="tsv")
@@ -352,7 +258,7 @@ def test_resume_tsv_error():
         pytest.fail("Expected error for --resume with TSV output")
     except subprocess.CalledProcessError as exc:
         stderr = exc.stderr.decode("utf8")
-        assert "Error: --resume only works with JSONL or Parquet" in stderr, \
+        assert "Error: --resume only works with JSONL output" in stderr, \
             f"Expected proper error message, got: {stderr}"
 
     print("TSV resume error test passed!")
@@ -387,10 +293,6 @@ def test_resume_data_equivalence():
         for row in full_rows[:resume_idx + 1]:
             f.write(json.dumps(row) + "\n")
 
-    checkpoint_path = get_checkpoint_path(partial_output_path)
-    with open(checkpoint_path, 'w') as f:
-        json.dump({"pageid": full_rows[resume_idx]["articleid"], "revid": resume_revid}, f)
-
     try:
         tester_partial.call_wikiq("--fandom-2020", "--resume")
     except subprocess.CalledProcessError as exc:
@@ -433,10 +335,6 @@ def test_resume_with_persistence():
         for row in full_rows[:resume_idx + 1]:
             f.write(json.dumps(row) + "\n")
 
-    checkpoint_path = get_checkpoint_path(partial_output_path)
-    with open(checkpoint_path, 'w') as f:
-        json.dump({"pageid": full_rows[resume_idx]["articleid"], "revid": resume_revid}, f)
-
     try:
         tester_partial.call_wikiq("--persistence wikidiff2", "--fandom-2020", "--resume")
     except subprocess.CalledProcessError as exc:
@@ -487,10 +385,6 @@ def test_resume_corrupted_jsonl_last_line():
     # Record file size before resume
     size_before = os.path.getsize(corrupt_output_path)
 
-    # NO checkpoint file - JSONL resume works from last valid line in the file
-    checkpoint_path = get_checkpoint_path(corrupt_output_path)
-    assert not os.path.exists(checkpoint_path), "Test setup error: checkpoint should not exist"
-
     # Resume should detect corrupted line, truncate it, then append new data
     try:
         tester_corrupt.call_wikiq("--fandom-2020", "--resume")
@@ -537,10 +431,6 @@ def test_resume_diff_persistence_combined():
         for row in full_rows[:resume_idx + 1]:
             f.write(json.dumps(row) + "\n")
 
-    checkpoint_path = get_checkpoint_path(partial_output_path)
-    with open(checkpoint_path, 'w') as f:
-        json.dump({"pageid": full_rows[resume_idx]["articleid"], "revid": resume_revid}, f)
-
     try:
         tester_partial.call_wikiq("--diff", "--persistence wikidiff2", "--fandom-2020", "--resume")
     except subprocess.CalledProcessError as exc:
@@ -588,7 +478,7 @@ def test_resume_mid_page():
     resume_revid = int(resume_rev["revid"])
     resume_pageid = int(resume_rev["articleid"])
 
-    # Find global index for checkpoint
+    # Find global index for the resume point
     global_idx = df_full[df_full["revid"] == resume_revid].index[0]
 
     tester_partial = WikiqTester(SAILORMOON, "resume_midpage_partial", in_compression="7z", out_format="jsonl")
@@ -600,10 +490,6 @@ def test_resume_mid_page():
         for row in rows_to_write:
             f.write(json.dumps(row) + "\n")
 
-    checkpoint_path = get_checkpoint_path(partial_output_path)
-    with open(checkpoint_path, 'w') as f:
-        json.dump({"pageid": resume_pageid, "revid": resume_revid}, f)
-
     try:
         tester_partial.call_wikiq("--diff", "--fandom-2020", "--resume")
     except subprocess.CalledProcessError as exc:
@@ -653,10 +539,6 @@ def test_resume_page_boundary():
         for row in rows_to_write:
             f.write(json.dumps(row) + "\n")
 
-    checkpoint_path = get_checkpoint_path(partial_output_path)
-    with open(checkpoint_path, 'w') as f:
-        json.dump({"pageid": resume_pageid, "revid": resume_revid}, f)
-
     try:
         tester_partial.call_wikiq("--diff", "--fandom-2020", "--resume")
     except subprocess.CalledProcessError as exc:
@@ -790,10 +672,6 @@ def test_resume_revert_detection():
         for row in full_rows[:resume_idx + 1]:
             f.write(json.dumps(row) + "\n")
 
-    checkpoint_path = get_checkpoint_path(partial_output_path)
-    with open(checkpoint_path, 'w') as f:
-        json.dump({"pageid": resume_pageid, "revid": resume_revid}, f)
-
     try:
         tester_partial.call_wikiq("--fandom-2020", "--resume")
     except subprocess.CalledProcessError as exc:
diff --git a/test/wikiq_test_utils.py b/test/wikiq_test_utils.py
index 77b0caf..337c67d 100644
--- a/test/wikiq_test_utils.py
+++ b/test/wikiq_test_utils.py
@@ -42,17 +42,8 @@ class WikiqTester:
             else:
                 shutil.rmtree(self.output)
 
-        # Also clean up resume-related files
-        for temp_suffix in [".resume_temp", ".checkpoint", ".merged"]:
-            temp_path = self.output + temp_suffix
-            if os.path.exists(temp_path):
-                if os.path.isfile(temp_path):
-                    os.remove(temp_path)
-                else:
-                    shutil.rmtree(temp_path)
-
-        # For JSONL and Parquet, self.output is a file path. Create parent directory if needed.
-        if out_format in ("jsonl", "parquet"):
+        # For JSONL, self.output is a file path. Create parent directory if needed.
+        if out_format == "jsonl":
             parent_dir = os.path.dirname(self.output)
             if parent_dir:
                 os.makedirs(parent_dir, exist_ok=True)