diff --git a/internal/certs/certs_test.go b/internal/certs/certs_test.go
index eb123d1c..fc761ce6 100644
--- a/internal/certs/certs_test.go
+++ b/internal/certs/certs_test.go
@@ -3,24 +3,48 @@ package certs
 import "testing"
 
 func TestLoadCertificates(t *testing.T) {
-	TestCert := "data/testclient.crt"
-	Testkey := "data/testclientkey.pem"
-	Passphrase := "security123"
+	testCert := "data/testclient.crt"
+	testKey := "data/testclientkey.pem"
+	passphrase := "qwer"
+	missingCert := "data/testclientcert_missing.crt"
 	missingTestkey := "data/testclientkey_missing.pem"
+	privateKey := "data/privated.pem"
+	privateCert := "data/cert.crt"
 
-	if certificate, err := LoadCertificate(&TestCert, &Testkey, nil); certificate == nil || err != nil {
+	// Try to load certificate that is not protected, expect success.
+	if certificate, err := LoadCertificate(&testCert, &testKey, nil); certificate == nil || err != nil {
 		t.Errorf("Failure: Couldn't load supposedly valid certificate.")
 	}
-	if certificate, err := LoadCertificate(nil, &Testkey, nil); certificate != nil || err == nil {
+	// Try to load no certificate, expect error.
+	if certificate, err := LoadCertificate(nil, &testKey, nil); certificate != nil || err == nil {
 		t.Errorf("Failure: No error despite missing certificate")
 	}
-	if certificate, err := LoadCertificate(&TestCert, &missingTestkey, nil); certificate != nil || err == nil {
+	// Try to load certificate using a nonexistent key, expect error.
+	if certificate, err := LoadCertificate(&testCert, &missingTestkey, nil); certificate != nil || err == nil {
 		t.Errorf("Failure: No Failure while loading certificate using missing key.")
 	}
-	if certificate, err := LoadCertificate(&TestCert, &Testkey, &Passphrase); certificate != nil || err == nil {
+	// Try to decrypt not encrypted certificate, expect error
+	if certificate, err := LoadCertificate(&testCert, &testKey, &passphrase); certificate != nil || err == nil {
 		t.Errorf("Failure: Could load unprotected valid certificate with passphrase.")
 	}
-	if certificate, err := LoadCertificate(&TestCert, &missingTestkey, &Passphrase); certificate != nil || err == nil {
+	// Try to load encrypted certificate using a nonexistent key, but valid passphrase. Expect error.
+	if certificate, err := LoadCertificate(&testCert, &missingTestkey, &passphrase); certificate != nil || err == nil {
 		t.Errorf("Failure:  No Failure while loading certificate using missing key with passphrase.")
 	}
+	// Try to load encrypted certificate, expecting success.
+	if certificate, err := LoadCertificate(&privateCert, &privateKey, &passphrase); certificate == nil || err != nil {
+		t.Errorf("Failure: Couldn't load supposedly valid encrypted certificate.")
+	}
+	// Try to load wrong encrypted certificate, expecting error.
+	if certificate, err := LoadCertificate(&testKey, &privateKey, &passphrase); certificate != nil || err == nil {
+		t.Errorf("Failure:  No Failure while loading certificate using wrong encrypted key.")
+	}
+	// Try to load nonexistent encrypted certificate, expecting error.
+	if certificate, err := LoadCertificate(&missingCert, &privateKey, &passphrase); certificate != nil || err == nil {
+		t.Errorf("Failure:  No Failure while loading nonexistens certificate.")
+	}
+	// Try to load nonexistent encrypted certificate, expecting error.
+	if certificate, err := LoadCertificate(nil, nil, nil); certificate != nil || err != nil {
+		t.Errorf("Failure:  Expected nil return.")
+	}
 }
diff --git a/internal/certs/data/cert.crt b/internal/certs/data/cert.crt
new file mode 100644
index 00000000..f80d61c2
--- /dev/null
+++ b/internal/certs/data/cert.crt
@@ -0,0 +1,37 @@
+-----BEGIN CERTIFICATE-----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+tVswsC/Hp8AI2Ro56mmHiWthuae1H8yDWUFLSe9AQW65qC/xVUgo/nMpK2BYVFKb
+70TMjl/dZM0Qn1tdiNyqCkbIhXjklZvZYhO+15TPkgDXDsqRUjpTrLZXLGrD6XIx
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+Qqz6FX/WHPxvswGKHk5zHYGHrzx7OKmfVa6gzUgZSfOHj2xOOR2Un9DwNavIrmSC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+-----END CERTIFICATE-----
diff --git a/internal/certs/data/privated.pem b/internal/certs/data/privated.pem
new file mode 100644
index 00000000..354598af
--- /dev/null
+++ b/internal/certs/data/privated.pem
@@ -0,0 +1,42 @@
+-----BEGIN RSA PRIVATE KEY-----
+Proc-Type: 4,ENCRYPTED
+DEK-Info: DES-CBC,054A583F6C90570F
+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+QmOioJYlSopOztyyBIuhZaNwVDQgoFtwHKRWAUseodzmHuPpvWCBjlL4hebJ7O0T
+HGHGddqam3IPmyradhk0o1Qb54uk9rrzKWjcOEw850mJt3DnkHRNRgY96Gg0fA+m
++UxEOuGPvOudOMtC32vDKwAZ9eGgxAKea/kvaLFdPqwiq3B+IBetjSYGZ2kxVOAD
+K8rHH6bnzrrasKHfOIBpw4MsiAG19sW1fFL61v5OXTcLOEQ/UVC8WinSj3JK894O
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+insi95+IuhkSUQL02AdkI3SQhSnfmFRZSsy6JTXSN/7XOOzRFyMJcR1WlXOKFpt9
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+ljVLrduRPt97JH4WWejy+k5vv4LHWJLsGGU474YHGMXF2VE3kJ3JKj8Wm5gS6p/p
+-----END RSA PRIVATE KEY-----