diff --git a/pywikidiff2/pywikidiff2.cpp b/pywikidiff2/pywikidiff2.cpp
index a70e453..b8789c5 100644
--- a/pywikidiff2/pywikidiff2.cpp
+++ b/pywikidiff2/pywikidiff2.cpp
@@ -104,7 +104,7 @@ static PyObject *pywikidiff2_inline_json_diff(pywikidiff2Obj *self, PyObject *ar
     PyErr_SetString(PyExc_ValueError, "Error in arguments to inline_json_diff");
     return NULL;
   }
-  if(numContextLines == NULL){
+  if(numContextLines != NULL){
     *(&self->config.numContextLines) = numContextLines;
   } 
   Wikidiff2 wikidiff2( *(&self->config));
@@ -118,7 +118,6 @@ static PyObject *pywikidiff2_inline_json_diff(pywikidiff2Obj *self, PyObject *ar
   wikidiff2.addFormatter(formatter);
   wikidiff2.execute(text1String, text2String);
   Wikidiff2::String ret = formatter.getResult().str();
-  PySys_WriteStdout(ret.c_str());
   return PyUnicode_FromFormat("%s",ret.c_str());
 };
 
diff --git a/test/test_pywikidiff2.py b/test/test_pywikidiff2.py
index 4cd3dcb..883140e 100644
--- a/test/test_pywikidiff2.py
+++ b/test/test_pywikidiff2.py
@@ -1,8 +1,9 @@
 import pywikidiff2
-
+import json
+num_context_lines = 100000
 obj = pywikidiff2.pywikidiff2()
-obj = pywikidiff2.pywikidiff2(numContextLines=500000)
-print(obj.num_context_lines())
+obj = pywikidiff2.pywikidiff2(numContextLines=num_context_lines)
+assert obj.num_context_lines() == num_context_lines
 print(obj.moved_line_threshold())
 print(obj.change_threshold())
 print(obj.moved_paragraph_detection_cutoff())
@@ -13,3 +14,11 @@ print(obj.final_split_threshold())
 res = obj.inline_json_diff("help! \n I'm alive", "help! \n dead I am")
 print('\n')
 print(res)
+res = obj.inline_json_diff(open("test/1295229484",'r').read(),
+                           open("test/1295229484_parmove_and_change",'r').read())
+res = json.loads(res)
+assert res["diff"][0]["type"] == 0
+print(res)
+res = obj.inline_json_diff(open("test/1295229484",'r').read(),
+                           open("test/1295229484_parmove_and_change",'r').read(),
+                           numContextLines=10)