diff --git a/lib/src/test/java/fi/protonode/certy/TestCertificateRevocationList.java b/lib/src/test/java/fi/protonode/certy/TestCertificateRevocationList.java
index 64250f4..c30757a 100644
--- a/lib/src/test/java/fi/protonode/certy/TestCertificateRevocationList.java
+++ b/lib/src/test/java/fi/protonode/certy/TestCertificateRevocationList.java
@@ -52,7 +52,7 @@ public static void init() throws Exception {
     }
 
     @Test
-    public void testAdd() throws Exception {
+    void testAdd() throws Exception {
         Credential anotherRevokedCert = new Credential().issuer(ca).subject("CN=revoked");
         CertificateRevocationList crl = new CertificateRevocationList().add(revokedCert).add(anotherRevokedCert);
         assertNotNull(crl);
@@ -65,7 +65,7 @@ public void testAdd() throws Exception {
     }
 
     @Test
-    public void testThisUpdate() throws Exception {
+    void testThisUpdate() throws Exception {
         Date thisUpdate = Date.from(Instant.parse("2023-01-01T09:00:00Z"));
         CertificateRevocationList crl = new CertificateRevocationList().thisUpdate(thisUpdate).add(revokedCert);
         assertNotNull(crl);
@@ -76,7 +76,7 @@ public void testThisUpdate() throws Exception {
     }
 
     @Test
-    public void testNextUpdate() throws Exception {
+    void testNextUpdate() throws Exception {
         Date nextUpdate = Date.from(Instant.parse("2100-01-01T09:00:00Z"));
         CertificateRevocationList crl = new CertificateRevocationList().nextUpdate(nextUpdate).add(revokedCert);
         assertNotNull(crl);
@@ -87,7 +87,7 @@ public void testNextUpdate() throws Exception {
     }
 
     @Test
-    public void testIssuer() throws Exception {
+    void testIssuer() throws Exception {
         CertificateRevocationList crl = new CertificateRevocationList().issuer(ca).add(revokedCert);
         assertNotNull(crl);
 
@@ -98,7 +98,7 @@ public void testIssuer() throws Exception {
     }
 
     @Test
-    public void testGetPem() throws Exception {
+    void testGetPem() throws Exception {
         CertificateRevocationList crl = new CertificateRevocationList().add(revokedCert);
         assertNotNull(crl);
 
@@ -115,7 +115,7 @@ public void testGetPem() throws Exception {
     }
 
     @Test
-    public void testWritingPem(@TempDir Path tempDir) throws Exception {
+    void testWritingPem(@TempDir Path tempDir) throws Exception {
         Path crlPath = tempDir.resolve("crl.pem");
 
         CertificateRevocationList crl = new CertificateRevocationList().add(revokedCert).writeAsPem(crlPath);
@@ -128,13 +128,13 @@ public void testWritingPem(@TempDir Path tempDir) throws Exception {
     }
 
     @Test
-    public void testUninitializedCaCertificate(@TempDir Path tempDir) throws Exception {
+    void testUninitializedCaCertificate(@TempDir Path tempDir) {
         Credential uninitialized = new Credential().subject("cn=ca"); // We have not called generate() yet.
         assertDoesNotThrow(() -> new CertificateRevocationList().issuer(uninitialized).writeAsPem(tempDir.resolve("crl.pem")));
     }
 
     @Test
-    public void testUninitializedRevokedCertificate(@TempDir Path tempDir) throws Exception {
+    void testUninitializedRevokedCertificate(@TempDir Path tempDir) {
         Credential uninitialized = new Credential().issuer(ca).subject("cn=uninitialized");  // We have not called generate() yet.
         assertDoesNotThrow(() -> new CertificateRevocationList().issuer(ca).add(uninitialized).writeAsPem(tempDir.resolve("crl.pem")));
     }
diff --git a/lib/src/test/java/fi/protonode/certy/TestCredential.java b/lib/src/test/java/fi/protonode/certy/TestCredential.java
index a390d25..858b404 100644
--- a/lib/src/test/java/fi/protonode/certy/TestCredential.java
+++ b/lib/src/test/java/fi/protonode/certy/TestCredential.java
@@ -22,7 +22,6 @@
 import org.bouncycastle.asn1.x509.GeneralName;
 import org.bouncycastle.asn1.x509.GeneralNames;
 import org.bouncycastle.asn1.x509.KeyPurposeId;
-import org.bouncycastle.cert.X509CRLHolder;
 import org.bouncycastle.cert.X509CertificateHolder;
 import org.bouncycastle.openssl.PEMParser;
 import org.bouncycastle.util.io.pem.PemObject;
@@ -61,7 +60,7 @@
 import java.util.Arrays;
 import java.util.Date;
 
-public class TestCredential {
+class TestCredential {
 
     @Test
     void testSubjectName() throws Exception {
@@ -77,7 +76,7 @@ void testSubjectAltName() throws Exception {
                 .getX509Certificate();
         assertNotNull(cert);
         assertEquals("CN=joe", cert.getSubjectX500Principal().getName());
-        Object expected[] = new Object[] {
+        Object[] expected = new Object[] {
                 Arrays.asList(GeneralName.dNSName, "host.example.com"),
                 Arrays.asList(GeneralName.uniformResourceIdentifier, "http://www.example.com"),
                 Arrays.asList(GeneralName.iPAddress, "1.2.3.4") };
@@ -239,20 +238,20 @@ void testNotBeforeAndNotAfter() throws Exception {
     }
 
     @Test
-    void testInvalidSubject() throws Exception {
+    void testInvalidSubject() {
         Credential cred = new Credential();
         assertThrows(IllegalArgumentException.class, () -> cred.subject("Foo=Bar"));
     }
 
     @Test
-    void testEmptySubjectAndSubjectAltNames() throws Exception {
+    void testEmptySubjectAndSubjectAltNames() {
         // Both subject and subject alternative name cannot be empty.
         Credential cred = new Credential();
         assertThrows(IllegalArgumentException.class, () -> cred.getX509Certificate());
     }
 
     @Test
-    void testInvalidSubjectAltName() throws Exception {
+    void testInvalidSubjectAltName() {
         Credential cred = new Credential().subject("CN=joe");
         assertThrows(IllegalArgumentException.class, () -> cred.subjectAltName("EMAIL:user@example.com"));
         assertThrows(IllegalArgumentException.class, () -> cred.subjectAltName("URL:"));
@@ -261,7 +260,7 @@ void testInvalidSubjectAltName() throws Exception {
     }
 
     @Test
-    void testInvalidKeySize() throws Exception {
+    void testInvalidKeySize() {
         Credential cred1 = new Credential().subject("CN=joe").keyType(KeyType.EC).keySize(1);
         assertThrows(IllegalArgumentException.class, () -> cred1.getX509Certificate());