diff --git a/field_test.go b/field_test.go
index 46187d6..379ceff 100644
--- a/field_test.go
+++ b/field_test.go
@@ -81,7 +81,7 @@ func TestField_Set(t *testing.T) {
 	}
 
 	if f.Value().(bool) {
-		t.Errorf("Setted value is wrong: %s want: %s", f.Value().(bool), false)
+		t.Errorf("Setted value is wrong: %t want: %t", f.Value().(bool), false)
 	}
 
 	// let's pass a different type