@@ -138,12 +138,12 @@
 	delta := diff.Diff(diff.D{len(input), len(decompressed),
 		func(i, j int) bool { return input[i] == decompressed[j] }})
 
 	// Return a well-formated error if any differences are found
 	if len(delta.Added) > 0 || len(delta.Removed) > 0 {
-		return fmt.Errorf("Unexpected decompressed output %v\ninput:  %#x\ntrace:  %#x\noutput: %#x\n",
-			delta, input, trace, decompressed)
+		return fmt.Errorf("Unexpected decompressed output %v\ninput: (%d) %#x\ntrace: (%d) %#x\noutput: (%d) %#x\n",
+			delta, len(input), input, len(trace), trace, len(decompressed), decompressed)
 	}
 
 	// All is good :)
 	return nil
 }