diff --git a/src/hipscat_import/pipeline_resume_plan.py b/src/hipscat_import/pipeline_resume_plan.py
index f223b3c4..3511d1da 100644
--- a/src/hipscat_import/pipeline_resume_plan.py
+++ b/src/hipscat_import/pipeline_resume_plan.py
@@ -172,30 +172,30 @@ def check_original_input_paths(self, input_paths):
         Raises:
             ValueError: if the retrieved file set differs from `input_paths`.
         """
-        unique_file_paths = set(input_paths)
+        input_paths = set(input_paths)
+        input_paths = [str(p) for p in input_paths]
+        input_paths.sort()
 
         original_input_paths = []
 
-        file_path = file_io.append_paths_to_pointer(self.tmp_path, self.ORIGINAL_INPUT_PATHS)
+        log_file_path = file_io.append_paths_to_pointer(self.tmp_path, self.ORIGINAL_INPUT_PATHS)
         try:
-            with open(file_path, "r", encoding="utf-8") as file_handle:
+            with open(log_file_path, "r", encoding="utf-8") as file_handle:
                 contents = file_handle.readlines()
             contents = [path.strip() for path in contents]
-            original_input_paths = set(contents)
+            original_input_paths = list(set(contents))
+            original_input_paths.sort()
         except FileNotFoundError:
             pass
 
         if len(original_input_paths) == 0:
-            file_path = file_io.append_paths_to_pointer(self.tmp_path, self.ORIGINAL_INPUT_PATHS)
-            with open(file_path, "w", encoding="utf-8") as file_handle:
+            with open(log_file_path, "w", encoding="utf-8") as file_handle:
                 for path in input_paths:
                     file_handle.write(f"{path}\n")
         else:
-            if original_input_paths != unique_file_paths:
+            if original_input_paths != input_paths:
                 raise ValueError("Different file set from resumed pipeline execution.")
 
-        input_paths = list(unique_file_paths)
-        input_paths.sort()
         return input_paths
 
 
diff --git a/tests/hipscat_import/test_pipeline_resume_plan.py b/tests/hipscat_import/test_pipeline_resume_plan.py
index c878d827..0f806660 100644
--- a/tests/hipscat_import/test_pipeline_resume_plan.py
+++ b/tests/hipscat_import/test_pipeline_resume_plan.py
@@ -3,6 +3,7 @@
 import os
 from pathlib import Path
 
+import numpy.testing as npt
 import pytest
 
 from hipscat_import.pipeline_resume_plan import PipelineResumePlan
@@ -135,3 +136,18 @@ def test_formatted_stage_name():
 
     formatted = PipelineResumePlan.get_formatted_stage_name("very long stage name")
     assert formatted == "Very long stage name"
+
+
+def test_check_original_input_paths(tmp_path, mixed_schema_csv_dir):
+    plan = PipelineResumePlan(tmp_path=tmp_path, progress_bar=False, resume=False)
+
+    input_file_list = [
+        Path(mixed_schema_csv_dir) / "input_01.csv",
+        Path(mixed_schema_csv_dir) / "input_02.csv",
+    ]
+
+    checked_files = plan.check_original_input_paths(input_file_list)
+
+    round_trip_files = plan.check_original_input_paths(checked_files)
+
+    npt.assert_array_equal(checked_files, round_trip_files)