diff --git a/testing/assert/pointer.go b/testing/assert/pointer.go
index 1b3013a22..9bf8ef991 100644
--- a/testing/assert/pointer.go
+++ b/testing/assert/pointer.go
@@ -23,7 +23,7 @@ type PointerSubject struct {
 
 func (subject *PointerSubject) Equals(expectation interface{}) {
 	if subject.value != expectation {
-		subject.Fail("is equal to", serial.PointerToString(expectation))
+		subject.Fail("is equal to", serial.ToString(expectation))
 	}
 }