diff --git a/src/tool_doswin.c b/src/tool_doswin.c
index 034462b384..a2d6bb81d7 100644
--- a/src/tool_doswin.c
+++ b/src/tool_doswin.c
@@ -206,6 +206,13 @@ SANITIZEcode sanitize_file_name(char ** const sanitized, const char *file_name,
     }
   }
 
+#ifdef DEBUGBUILD
+  if(getenv("CURL_FN_SANITIZE_BAD"))
+    return SANITIZE_ERR_INVALID_PATH;
+  if(getenv("CURL_FN_SANITIZE_OOM"))
+    return SANITIZE_ERR_OUT_OF_MEMORY;
+#endif
+
   *sanitized = target;
   return SANITIZE_ERR_OK;
 }