diff --git a/tests/test_file_helper.cpp b/tests/test_file_helper.cpp
index a27b442f..c4487a1a 100644
--- a/tests/test_file_helper.cpp
+++ b/tests/test_file_helper.cpp
@@ -145,13 +145,13 @@ TEST_CASE("file_event_handlers", "[file_helper]")
         events.clear();    
         helper.close();        
         REQUIRE(events == std::vector<flags>{flags::before_close, flags::after_close});
-        REQUIRE(file_contents(test_filename) == "after_open\nbefore_close\n");
+        REQUIRE(file_contents(TEST_FILENAME) == "after_open\nbefore_close\n");
 
         helper.reopen(true);
         events.clear();    
     }
     // make sure that the file_helper destrcutor calls the close callbacks if needed    
     REQUIRE(events == std::vector<flags>{flags::before_close, flags::after_close});
-    REQUIRE(file_contents(test_filename) == "after_open\nbefore_close\n");
+    REQUIRE(file_contents(TEST_FILENAME) == "after_open\nbefore_close\n");
 
 }