diff --git a/bool_test.go b/bool_test.go
index afd25ae..3e38a0f 100644
--- a/bool_test.go
+++ b/bool_test.go
@@ -172,9 +172,9 @@
 		t.Error("expected no error, got ", err)
 	}
 	if *b != true {
-		t.Errorf("expected b=true got b=%s", b)
+		t.Errorf("expected b=true got b=%v", *b)
 	}
 	if *c != false {
-		t.Errorf("expect c=false got c=%s", c)
+		t.Errorf("expect c=false got c=%v", *c)
 	}
 }