diff --git a/dummy-child-cert-ecdsa.pem b/dummy-chain-cert-ecdsa.pem
similarity index 100%
rename from dummy-child-cert-ecdsa.pem
rename to dummy-chain-cert-ecdsa.pem
diff --git a/dummy-child-cert-ecdsa.pem.license b/dummy-chain-cert-ecdsa.pem.license
similarity index 100%
rename from dummy-child-cert-ecdsa.pem.license
rename to dummy-chain-cert-ecdsa.pem.license
diff --git a/msg_test.go b/msg_test.go
index 2aeab91..aa46f94 100644
--- a/msg_test.go
+++ b/msg_test.go
@@ -3371,7 +3371,7 @@ func TestSignWithSMime_ValidECDSAKeyPair(t *testing.T) {
 	if err := m.SignWithSMimeECDSA(privateKey, certificate, intermediateCertificate); err != nil {
 		t.Errorf("failed to set sMime. Cause: %v", err)
 	}
-	if m.sMime.privateKey.rsa == nil {
+	if m.sMime.privateKey.ecdsa == nil {
 		t.Errorf("WithSMimeSinging() - no private key is given")
 	}
 	if m.sMime.certificate == nil {
diff --git a/util_test.go b/util_test.go
index 17821aa..7640f62 100644
--- a/util_test.go
+++ b/util_test.go
@@ -16,7 +16,7 @@ const (
 	keyRSAFilePath  = "dummy-child-key-rsa.pem"
 
 	certECDSAFilePath = "dummy-chain-cert-ecdsa.pem"
-	keyECDSAFilePath  = "dummy-child-cert-ecdsa.pem"
+	keyECDSAFilePath  = "dummy-child-key-ecdsa.pem"
 )
 
 // getDummyRSACryptoMaterial loads a certificate (RSA) and the associated private key (ECDSA) form local disk for testing purposes