Formatting fixed
diff --git a/parsemail_test.go b/parsemail_test.go
index 6904f3b..622003e 100644
--- a/parsemail_test.go
+++ b/parsemail_test.go
@@ -382,7 +382,7 @@
 		}
 
 		if len(td.embeddedFiles) != len(e.EmbeddedFiles) {
-			t.Errorf("[Test Case %v] Incorrect number of embedded files! Expected: %s, Got: %v.", index, len(td.embeddedFiles), len(e.EmbeddedFiles))
+			t.Errorf("[Test Case %v] Incorrect number of embedded files! Expected: %v, Got: %v.", index, len(td.embeddedFiles), len(e.EmbeddedFiles))
 		} else {
 			embeds := e.EmbeddedFiles[:]