diff --git a/tools/dwh-auth/internal/credential/credential_test.go b/tools/dwh-auth/internal/credential/credential_test.go
index ba4de877..0b35154c 100644
--- a/tools/dwh-auth/internal/credential/credential_test.go
+++ b/tools/dwh-auth/internal/credential/credential_test.go
@@ -83,7 +83,7 @@ func TestVerifyV1RejectsNonCanonicalValues(t *testing.T) {
 		[]byte(string(material.Value) + "." + material.KeyID),
 		[]byte(string(material.Value) + "="),
 		[]byte(" " + string(material.Value)),
-		append(bytes.Repeat([]byte{'a'}, MaxHeaderBytes+1)),
+		bytes.Repeat([]byte{'a'}, MaxHeaderBytes+1),
 	} {
 		if keyID, ok := VerifyV1(value, material.Digest); ok || keyID != "" {
 			t.Fatalf("VerifyV1(%q) = (%q, %t), want (\"\", false)", value, keyID, ok)