diff --git a/tests/conformance-test/test_26252.py b/tests/conformance-test/test_26252.py
index 395e258e126c0013fcdaa05c14f32af1c7a4189d..3199817c1042991dee7e269d5acc422b30387509 100644
--- a/tests/conformance-test/test_26252.py
+++ b/tests/conformance-test/test_26252.py
@@ -128,9 +128,25 @@ def test_26252(test_tag, encoder_path, decoder_path, renderer_path, isar_post_re
         subprocess.run([isar_post_renderer_path] + isar_post_rend_opts.split()[1:], check = True)        
 
     diff_opts = replace_paths(diff_opts, testv_path, ref_path, cut_path)
-    result = True
+
+    diff_in_wav = False
+    diff_in_met = False
+    diff_in_csv = False
     for cmd in diff_opts.split(';'):
-        result = result and filecmp.cmp(cmd.split()[1], cmd.split()[2])
-    if not result:
-        assert False, "Output differs" 
+        if not filecmp.cmp(cmd.split()[1], cmd.split()[2]):
+            if ".csv" in cmd.split()[1]:
+                diff_in_csv = True
+            elif ".met" in cmd.split()[1]:
+                diff_in_met = True
+            else:
+                diff_in_wav = True
 
+    if diff_in_wav or diff_in_csv or diff_in_met:
+        result_str = "Output differs in: "
+        if diff_in_wav:
+            result_str = result_str + "waveform "
+        if diff_in_met:
+            result_str = result_str + "MASA metadata "
+        if diff_in_csv:
+            result_str = result_str + "object metadata "
+        assert False, result_str