diff --git a/src/hipscat_import/catalog/map_reduce.py b/src/hipscat_import/catalog/map_reduce.py
index 39b81c32..3294d45c 100644
--- a/src/hipscat_import/catalog/map_reduce.py
+++ b/src/hipscat_import/catalog/map_reduce.py
@@ -163,7 +163,7 @@ def split_pixels(
                 filtered_data.to_parquet(output_file, index=True)
             else:
                 filtered_data.to_parquet(output_file, index=False)
-        del filtered_data, data_indexes
+            del filtered_data, data_indexes
 
     ResumePlan.splitting_key_done(tmp_path=resume_path, splitting_key=splitting_key)
 
diff --git a/tests/hipscat_import/catalog/test_argument_validation.py b/tests/hipscat_import/catalog/test_argument_validation.py
index faa7114d..65625eec 100644
--- a/tests/hipscat_import/catalog/test_argument_validation.py
+++ b/tests/hipscat_import/catalog/test_argument_validation.py
@@ -91,7 +91,7 @@ def test_multiple_files_in_path(small_sky_parts_dir, tmp_path):
         progress_bar=False,
     )
     assert args.input_path == small_sky_parts_dir
-    assert len(args.input_paths) == 5
+    assert len(args.input_paths) == 6
 
 
 def test_single_debug_file(formats_headers_csv, tmp_path):
diff --git a/tests/hipscat_import/data/small_sky_parts/catalog_10_of_05.csv b/tests/hipscat_import/data/small_sky_parts/catalog_10_of_05.csv
new file mode 100644
index 00000000..7f2b7ff0
--- /dev/null
+++ b/tests/hipscat_import/data/small_sky_parts/catalog_10_of_05.csv
@@ -0,0 +1 @@
+id,ra,dec,ra_error,dec_error