diff --git a/hstest/testing/execution/searcher/base_searcher.py b/hstest/testing/execution/searcher/base_searcher.py
index 71c44a86..d4501d52 100644
--- a/hstest/testing/execution/searcher/base_searcher.py
+++ b/hstest/testing/execution/searcher/base_searcher.py
@@ -253,11 +253,11 @@ def _parse_source(self, source: str) -> tuple[Path, Path, Module]:
         if source.name.endswith(ext):
             source_folder = None
             source_file = source
-            source_module = source[: -len(ext)].replace(os.sep, ".")
+            source_module = str(source)[:-len(ext)].replace(os.sep, ".")
 
-        elif os.sep in source:
+        elif os.sep in str(source):
             if source.name.endswith(os.sep):
-                source = source[: -len(os.sep)]
+                source = str(source)[:-len(os.sep)]
 
             source_folder = source
             source_file = None