diff --git a/bar_test.go b/bar_test.go
index d383ee1..6baeead 100644
--- a/bar_test.go
+++ b/bar_test.go
@@ -99,7 +99,7 @@
 
 	bytes := removeLastRune(buf.Bytes())
 	got := string(bytes[len(bytes)-customWidth:])
-	want := "[==========================================================]"
+	want := fmt.Sprintf("[%s]", strings.Repeat("=", customWidth-2))
 	if got != want {
 		t.Errorf("Expected format: %s, got %s\n", want, got)
 	}