diff --git a/src/test/java/org/codehaus/mojo/buildhelper/ParseVersionTest.java b/src/test/java/org/codehaus/mojo/buildhelper/ParseVersionTest.java
index 4ecb55b2..3cf57ff9 100644
--- a/src/test/java/org/codehaus/mojo/buildhelper/ParseVersionTest.java
+++ b/src/test/java/org/codehaus/mojo/buildhelper/ParseVersionTest.java
@@ -32,27 +32,28 @@
 
 import static org.junit.jupiter.api.Assertions.assertEquals;
 
-public class ParseVersionTest {
-    public static class TestParseVersionMojo extends ParseVersionMojo {
+class ParseVersionTest {
+    static class TestParseVersionMojo extends ParseVersionMojo {
         private final Properties properties;
 
-        public TestParseVersionMojo(Properties properties) {
+        TestParseVersionMojo(Properties properties) {
             this.properties = properties;
         }
 
+        @Override
         protected void defineProperty(String name, String value) {
             properties.put(name, value);
         }
     }
 
     @Nested
-    public class TestParseVersion {
+    class TestParseVersion {
         private Properties props;
 
         private ParseVersionMojo mojo;
 
         @BeforeEach
-        public void beforeClass() {
+        void beforeClass() {
             props = new Properties();
             mojo = new TestParseVersionMojo(props);
             mojo.setPropertyPrefix("parsed");
@@ -67,7 +68,7 @@ public void beforeClass() {
         }
 
         @Test
-        public void checkJunkVersion() {
+        void checkJunkVersion() {
             // Test a junk version string
             mojo.parseVersion("junk");
 
@@ -80,7 +81,7 @@ public void checkJunkVersion() {
         }
 
         @Test
-        public void checkBasicMavenVersionString() {
+        void checkBasicMavenVersionString() {
             // Test a basic maven version string
             mojo.parseVersion("1.0.0");
 
@@ -93,7 +94,7 @@ public void checkBasicMavenVersionString() {
         }
 
         @Test
-        public void checkVersionStringWithQualifier() {
+        void checkVersionStringWithQualifier() {
             // Test a version string with qualifier
             mojo.parseVersion("2.3.4-beta-5");
 
@@ -106,7 +107,7 @@ public void checkVersionStringWithQualifier() {
         }
 
         @Test
-        public void checkOSGiVersionStringWithQualifier() {
+        void checkOSGiVersionStringWithQualifier() {
             // Test an osgi version string
             mojo.parseVersion("2.3.4.beta_5");
 
@@ -119,7 +120,7 @@ public void checkOSGiVersionStringWithQualifier() {
         }
 
         @Test
-        public void checkSnapshotVersion() {
+        void checkSnapshotVersion() {
             // Test a snapshot version string
             mojo.parseVersion("1.2.3-SNAPSHOT");
 
@@ -132,7 +133,7 @@ public void checkSnapshotVersion() {
         }
 
         @Test
-        public void checkSnapshotVersion2() {
+        void checkSnapshotVersion2() {
             // Test a snapshot version string
             mojo.parseVersion("2.0.17-SNAPSHOT");
 
@@ -145,7 +146,7 @@ public void checkSnapshotVersion2() {
         }
 
         @Test
-        public void checkVersionStringWithBuildNumber() {
+        void checkVersionStringWithBuildNumber() {
             // Test a version string with a build number
             mojo.parseVersion("1.2.3-4");
 
@@ -158,7 +159,7 @@ public void checkVersionStringWithBuildNumber() {
         }
 
         @Test
-        public void checkSnapshotVersionStringWithBuildNumber() {
+        void checkSnapshotVersionStringWithBuildNumber() {
             // Test a version string with a build number
             mojo.parseVersion("1.2.3-4-SNAPSHOT");
 
@@ -178,7 +179,7 @@ class TestParseNextVersion {
         private ParseVersionMojo mojo;
 
         @BeforeEach
-        public void beforeClass() {
+        void beforeClass() {
             props = new Properties();
             mojo = new TestParseVersionMojo(props);
             mojo.setPropertyPrefix("parsed");
@@ -192,7 +193,7 @@ public void beforeClass() {
         }
 
         @Test
-        public void checkJunkVersion() {
+        void checkJunkVersion() {
             mojo.parseVersion("junk");
 
             assertEquals("1", props.getProperty("parsed.nextMajorVersion"));
@@ -202,7 +203,7 @@ public void checkJunkVersion() {
         }
 
         @Test
-        public void testBasicMavenVersion() {
+        void testBasicMavenVersion() {
             mojo.parseVersion("1.0.0");
 
             assertEquals("2", props.getProperty("parsed.nextMajorVersion"));
@@ -212,7 +213,7 @@ public void testBasicMavenVersion() {
         }
 
         @Test
-        public void testVersionStringWithQualifier() {
+        void testVersionStringWithQualifier() {
             mojo.parseVersion("2.3.4-beta-5");
 
             assertEquals("3", props.getProperty("parsed.nextMajorVersion"));
@@ -222,7 +223,7 @@ public void testVersionStringWithQualifier() {
         }
 
         @Test
-        public void testOSGiVersion() {
+        void testOSGiVersion() {
             mojo.parseVersion("2.3.4.beta_5");
 
             assertEquals("3", props.getProperty("parsed.nextMajorVersion"));
@@ -232,7 +233,7 @@ public void testOSGiVersion() {
         }
 
         @Test
-        public void testSnapshotVersion() {
+        void testSnapshotVersion() {
             // Test a snapshot version string
             mojo.parseVersion("1.2.3-SNAPSHOT");
 
@@ -243,7 +244,7 @@ public void testSnapshotVersion() {
         }
 
         @Test
-        public void testSnapshotVersion2() {
+        void testSnapshotVersion2() {
             // Test a snapshot version string
             mojo.parseVersion("2.0.17-SNAPSHOT");
 
@@ -254,7 +255,7 @@ public void testSnapshotVersion2() {
         }
 
         @Test
-        public void testVersionStringWithBuildNumber() {
+        void testVersionStringWithBuildNumber() {
             mojo.parseVersion("1.2.3-4");
 
             assertEquals("2", props.getProperty("parsed.nextMajorVersion"));
@@ -271,7 +272,7 @@ class TestFormattedVersion {
         private ParseVersionMojo mojo;
 
         @BeforeEach
-        public void beforeClass() {
+        void beforeClass() {
             props = new Properties();
             mojo = new TestParseVersionMojo(props);
             mojo.setPropertyPrefix("parsed");
@@ -285,7 +286,7 @@ public void beforeClass() {
         }
 
         @Test
-        public void testJunkVersion() {
+        void testJunkVersion() {
             mojo.parseVersion("junk");
 
             assertEquals("00", props.getProperty("formatted.majorVersion"));
@@ -300,7 +301,7 @@ public void testJunkVersion() {
         }
 
         @Test
-        public void testBasicMavenVersion() {
+        void testBasicMavenVersion() {
             mojo.parseVersion("1.0.0");
 
             assertEquals("01", props.getProperty("formatted.majorVersion"));
@@ -315,7 +316,7 @@ public void testBasicMavenVersion() {
         }
 
         @Test
-        public void testVersionStringWithQualifier() {
+        void testVersionStringWithQualifier() {
             mojo.parseVersion("2.3.4-beta-5");
 
             assertEquals("02", props.getProperty("formatted.majorVersion"));
@@ -330,7 +331,7 @@ public void testVersionStringWithQualifier() {
         }
 
         @Test
-        public void testOSGiVersion() {
+        void testOSGiVersion() {
             mojo.parseVersion("2.3.4.beta_5");
 
             assertEquals("02", props.getProperty("formatted.majorVersion"));
@@ -345,7 +346,7 @@ public void testOSGiVersion() {
         }
 
         @Test
-        public void testSnapshotVersion() {
+        void testSnapshotVersion() {
             // Test a snapshot version string
             mojo.parseVersion("1.2.3-SNAPSHOT");
 
@@ -361,7 +362,7 @@ public void testSnapshotVersion() {
         }
 
         @Test
-        public void testSnapshotVersion2() {
+        void testSnapshotVersion2() {
             // Test a snapshot version string
             mojo.parseVersion("2.0.17-SNAPSHOT");
 
@@ -377,7 +378,7 @@ public void testSnapshotVersion2() {
         }
 
         @Test
-        public void testVersionStringWithBuildNumber() {
+        void testVersionStringWithBuildNumber() {
             mojo.parseVersion("1.2.3-4");
 
             assertEquals("01", props.getProperty("formatted.majorVersion"));
diff --git a/src/test/java/org/codehaus/mojo/buildhelper/versioning/VersionInformationTest.java b/src/test/java/org/codehaus/mojo/buildhelper/versioning/VersionInformationTest.java
index 664f5ec6..fa04a48f 100644
--- a/src/test/java/org/codehaus/mojo/buildhelper/versioning/VersionInformationTest.java
+++ b/src/test/java/org/codehaus/mojo/buildhelper/versioning/VersionInformationTest.java
@@ -29,7 +29,7 @@
 /**
  * @author Karl Heinz Marbaise <a href="mailto:khmarbaise@apache.org">khmarbaise@apache.org</a>
  */
-public class VersionInformationTest {
+class VersionInformationTest {
     // @formatter:off
     private static Object[][] createVersions() {
         return new Object[][] {
@@ -71,7 +71,7 @@ private static Object[][] createVersions() {
 
     @ParameterizedTest
     @MethodSource("createVersions")
-    public void checkVersions(String version, int major, int minor, int patch, long buildNumber, String qualifier) {
+    void checkVersions(String version, int major, int minor, int patch, long buildNumber, String qualifier) {
         VersionInformation vi = new VersionInformation(version);
         assertEquals(vi.getMajor(), major);
         assertEquals(vi.getMinor(), minor);
@@ -81,7 +81,7 @@ public void checkVersions(String version, int major, int minor, int patch, long
     }
 
     @Test
-    public void shouldFaileWithNumberFormatException() {
+    void shouldFaileWithNumberFormatException() {
         assertThrows(NumberFormatException.class, () -> new VersionInformation("999999999999.12345678.12.beta_5"));
     }
 }