diff --git a/pom.xml b/pom.xml
index b946481..3ae08b0 100644
--- a/pom.xml
+++ b/pom.xml
@@ -31,7 +31,6 @@
   </distributionManagement>
 
   <properties>
-    <junit5Version>5.12.1</junit5Version>
     <versions.eclipse.sisu>0.9.0.M4</versions.eclipse.sisu>
     <project.build.outputTimestamp>2025-04-05T17:02:05Z</project.build.outputTimestamp>
   </properties>
@@ -61,7 +60,7 @@
     <dependency>
       <groupId>com.google.inject</groupId>
       <artifactId>guice</artifactId>
-      <version>6.0.0</version>
+      <version>5.1.0</version>
     </dependency>
     <!-- needed by Guava 33.4.3+ for javax.annotations.Nullable -->
     <dependency>
@@ -69,14 +68,6 @@
       <artifactId>jsr305</artifactId>
       <version>3.0.2</version>
     </dependency>
-    <dependency>
-      <groupId>jakarta.annotation</groupId>
-      <artifactId>jakarta.annotation-api</artifactId>
-      <version>2.1.1</version>
-      <scope>provided</scope>
-      <optional>true</optional>
-    </dependency>
-
     <dependency>
       <groupId>org.junit.jupiter</groupId>
       <artifactId>junit-jupiter-api</artifactId>
diff --git a/src/test/java/org/codehaus/plexus/testing/PlexusTestJakartaTest.java b/src/test/java/org/codehaus/plexus/testing/PlexusTestJakartaTest.java
deleted file mode 100644
index 72e39da..0000000
--- a/src/test/java/org/codehaus/plexus/testing/PlexusTestJakartaTest.java
+++ /dev/null
@@ -1,46 +0,0 @@
-package org.codehaus.plexus.testing;
-
-/*
- * Licensed to the Apache Software Foundation (ASF) under one
- * or more contributor license agreements.  See the NOTICE file
- * distributed with this work for additional information
- * regarding copyright ownership.  The ASF licenses this file
- * to you under the Apache License, Version 2.0 (the
- * "License"); you may not use this file except in compliance
- * with the License.  You may obtain a copy of the License at
- *
- *   http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing,
- * software distributed under the License is distributed on an
- * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
- * KIND, either express or implied.  See the License for the
- * specific language governing permissions and limitations
- * under the License.
- */
-
-import jakarta.inject.Inject;
-import org.junit.jupiter.api.Test;
-
-import static org.junit.jupiter.api.Assertions.assertNotNull;
-import static org.junit.jupiter.api.Assertions.assertNull;
-
-@PlexusTest
-class PlexusTestJakartaTest {
-
-    @Inject
-    private TestJakartaComponent testJakartaComponent;
-
-    @Test
-    void dependencyShouldBeInjected() {
-        assertNotNull(testJakartaComponent);
-        assertNotNull(testJakartaComponent.getTestJakartaComponent2());
-        // assertNotNull(testJakartaComponent.getTestJakartaComponent3Named());
-        assertNull(testJakartaComponent.getTestJakartaComponent3NullableJavax());
-        assertNull(testJakartaComponent.getTestJakartaComponent3NullableJakarta());
-
-        assertNotNull(testJakartaComponent.getTestJavaxComponent2());
-        assertNotNull(testJakartaComponent.getTestJavaxComponent2());
-        assertNotNull(testJakartaComponent.getTestJavaxComponent2());
-    }
-}
diff --git a/src/test/java/org/codehaus/plexus/testing/TestJakartaComponent.java b/src/test/java/org/codehaus/plexus/testing/TestJakartaComponent.java
deleted file mode 100644
index c4912a5..0000000
--- a/src/test/java/org/codehaus/plexus/testing/TestJakartaComponent.java
+++ /dev/null
@@ -1,67 +0,0 @@
-package org.codehaus.plexus.testing;
-
-/*
- * Licensed to the Apache Software Foundation (ASF) under one
- * or more contributor license agreements.  See the NOTICE file
- * distributed with this work for additional information
- * regarding copyright ownership.  The ASF licenses this file
- * to you under the Apache License, Version 2.0 (the
- * "License"); you may not use this file except in compliance
- * with the License.  You may obtain a copy of the License at
- *
- *   http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing,
- * software distributed under the License is distributed on an
- * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
- * KIND, either express or implied.  See the License for the
- * specific language governing permissions and limitations
- * under the License.
- */
-
-import jakarta.inject.Inject;
-import jakarta.inject.Named;
-
-@Named
-public class TestJakartaComponent {
-    @Inject
-    private TestJavaxComponent2 testJavaxComponent2;
-
-    @Inject
-    private TestJakartaComponent2 testJakartaComponent2;
-
-    //  @Inject
-    //  @Nonnull
-    //  @Named("someComponent")
-    //  private TestJakartaComponent3 testJakartaComponent3Named;
-
-    @Inject
-    @javax.annotation.Nullable
-    @Named("someComponentNotExisting")
-    private TestJakartaComponent3 testJakartaComponent3NullableJavax;
-
-    @Inject
-    @jakarta.annotation.Nullable
-    @Named("someComponentNotExisting")
-    private TestJakartaComponent3 testJakartaComponent3NullableJakarta;
-
-    public TestJavaxComponent2 getTestJavaxComponent2() {
-        return testJavaxComponent2;
-    }
-
-    public TestJakartaComponent2 getTestJakartaComponent2() {
-        return testJakartaComponent2;
-    }
-
-    // public TestJakartaComponent3 getTestJakartaComponent3Named() {
-    //    return testJakartaComponent3Named;
-    // }
-
-    public TestJakartaComponent3 getTestJakartaComponent3NullableJavax() {
-        return testJakartaComponent3NullableJavax;
-    }
-
-    public TestJakartaComponent3 getTestJakartaComponent3NullableJakarta() {
-        return testJakartaComponent3NullableJakarta;
-    }
-}
diff --git a/src/test/java/org/codehaus/plexus/testing/TestJakartaComponent2.java b/src/test/java/org/codehaus/plexus/testing/TestJakartaComponent2.java
deleted file mode 100644
index 7db989d..0000000
--- a/src/test/java/org/codehaus/plexus/testing/TestJakartaComponent2.java
+++ /dev/null
@@ -1,25 +0,0 @@
-package org.codehaus.plexus.testing;
-
-/*
- * Licensed to the Apache Software Foundation (ASF) under one
- * or more contributor license agreements.  See the NOTICE file
- * distributed with this work for additional information
- * regarding copyright ownership.  The ASF licenses this file
- * to you under the Apache License, Version 2.0 (the
- * "License"); you may not use this file except in compliance
- * with the License.  You may obtain a copy of the License at
- *
- *   http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing,
- * software distributed under the License is distributed on an
- * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
- * KIND, either express or implied.  See the License for the
- * specific language governing permissions and limitations
- * under the License.
- */
-
-import javax.inject.Named;
-
-@Named
-public class TestJakartaComponent2 {}
diff --git a/src/test/java/org/codehaus/plexus/testing/TestJakartaComponent3.java b/src/test/java/org/codehaus/plexus/testing/TestJakartaComponent3.java
deleted file mode 100644
index cb0b286..0000000
--- a/src/test/java/org/codehaus/plexus/testing/TestJakartaComponent3.java
+++ /dev/null
@@ -1,25 +0,0 @@
-package org.codehaus.plexus.testing;
-
-/*
- * Licensed to the Apache Software Foundation (ASF) under one
- * or more contributor license agreements.  See the NOTICE file
- * distributed with this work for additional information
- * regarding copyright ownership.  The ASF licenses this file
- * to you under the Apache License, Version 2.0 (the
- * "License"); you may not use this file except in compliance
- * with the License.  You may obtain a copy of the License at
- *
- *   http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing,
- * software distributed under the License is distributed on an
- * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
- * KIND, either express or implied.  See the License for the
- * specific language governing permissions and limitations
- * under the License.
- */
-
-import jakarta.inject.Named;
-
-@Named("someComponent")
-public class TestJakartaComponent3 {}