diff --git a/resteasy-rxjava2/pom.xml b/resteasy-rxjava2/pom.xml
index 42b355cc7c2..5126b41abf9 100644
--- a/resteasy-rxjava2/pom.xml
+++ b/resteasy-rxjava2/pom.xml
@@ -50,8 +50,8 @@
 
       <!-- Test dependencies -->
       <dependency>
-          <groupId>junit</groupId>
-          <artifactId>junit</artifactId>
+          <groupId>org.junit.jupiter</groupId>
+          <artifactId>junit-jupiter-api</artifactId>
           <scope>test</scope>
       </dependency>
       <dependency>
diff --git a/resteasy-rxjava2/src/test/java/org/jboss/resteasy/rxjava2/RxTest.java b/resteasy-rxjava2/src/test/java/org/jboss/resteasy/rxjava2/RxTest.java
index 9031e1a6a3b..795abf68464 100644
--- a/resteasy-rxjava2/src/test/java/org/jboss/resteasy/rxjava2/RxTest.java
+++ b/resteasy-rxjava2/src/test/java/org/jboss/resteasy/rxjava2/RxTest.java
@@ -1,8 +1,6 @@
 package org.jboss.resteasy.rxjava2;
 
 import static org.jboss.resteasy.test.TestPortProvider.generateURL;
-import static org.junit.Assert.assertArrayEquals;
-import static org.junit.Assert.assertEquals;
 
 import java.util.Set;
 import java.util.TreeSet;
@@ -19,12 +17,12 @@
 import org.jboss.resteasy.client.jaxrs.ResteasyClientBuilder;
 import org.jboss.resteasy.plugins.server.netty.NettyJaxrsServer;
 import org.jboss.resteasy.test.TestPortProvider;
-import org.junit.After;
-import org.junit.AfterClass;
-import org.junit.Assert;
-import org.junit.Before;
-import org.junit.BeforeClass;
-import org.junit.Test;
+import org.junit.jupiter.api.AfterAll;
+import org.junit.jupiter.api.AfterEach;
+import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.BeforeAll;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
 
 import io.reactivex.Flowable;
 import io.reactivex.Observable;
@@ -37,7 +35,7 @@ public class RxTest {
     private static AtomicReference<Object> value = new AtomicReference<Object>();
     private static final Logger LOG = Logger.getLogger(NettyJaxrsServer.class);
 
-    @BeforeClass
+    @BeforeAll
     public static void beforeClass() throws Exception {
         server = new NettyJaxrsServer();
         server.setPort(TestPortProvider.getPort());
@@ -49,7 +47,7 @@ public static void beforeClass() throws Exception {
         server.start();
     }
 
-    @AfterClass
+    @AfterAll
     public static void afterClass() throws Exception {
         server.stop();
         server = null;
@@ -57,7 +55,7 @@ public static void afterClass() throws Exception {
 
     private ResteasyClient client;
 
-    @Before
+    @BeforeEach
     public void before() {
         client = ((ResteasyClientBuilder) ClientBuilder.newBuilder())
                 .readTimeout(5, TimeUnit.SECONDS)
@@ -68,7 +66,7 @@ public void before() {
         latch = new CountDownLatch(1);
     }
 
-    @After
+    @AfterEach
     public void after() {
         client.close();
     }
@@ -81,7 +79,7 @@ public void testSingle() throws Exception {
             latch.countDown();
         });
         latch.await(5, TimeUnit.SECONDS);
-        assertEquals("got it", value.get());
+        Assertions.assertEquals("got it", value.get());
     }
 
     @Test
@@ -92,7 +90,7 @@ public void testSingleContext() throws Exception {
             latch.countDown();
         });
         latch.await(5, TimeUnit.SECONDS);
-        assertEquals("got it", value.get());
+        Assertions.assertEquals("got it", value.get());
     }
 
     @Test
@@ -106,7 +104,7 @@ public void testObservable() throws Exception {
                 (Throwable t) -> LOG.error(t.getMessage(), t),
                 () -> latch.countDown());
         latch.await(5, TimeUnit.SECONDS);
-        assertArrayEquals(new String[] { "one", "two" }, data.toArray());
+        Assertions.assertArrayEquals(new String[] { "one", "two" }, data.toArray());
     }
 
     @Test
@@ -121,7 +119,7 @@ public void testObservableContext() throws Exception {
                 (Throwable t) -> LOG.error(t.getMessage(), t),
                 () -> latch.countDown());
         latch.await(5, TimeUnit.SECONDS);
-        assertArrayEquals(new String[] { "one", "two" }, data.toArray());
+        Assertions.assertArrayEquals(new String[] { "one", "two" }, data.toArray());
     }
 
     @Test
@@ -135,7 +133,7 @@ public void testFlowable() throws Exception {
                 (Throwable t) -> LOG.error(t.getMessage(), t),
                 () -> latch.countDown());
         latch.await(5, TimeUnit.SECONDS);
-        assertArrayEquals(new String[] { "one", "two" }, data.toArray());
+        Assertions.assertArrayEquals(new String[] { "one", "two" }, data.toArray());
     }
 
     @Test
@@ -152,7 +150,7 @@ public void testFlowablecontext() throws Exception {
                     LOG.info("onComplete()");
                 });
         latch.await(5, TimeUnit.SECONDS);
-        assertArrayEquals(new String[] { "one", "two" }, data.toArray());
+        Assertions.assertArrayEquals(new String[] { "one", "two" }, data.toArray());
     }
 
     // @Test
@@ -160,16 +158,16 @@ public void testChunked() throws Exception {
         Invocation.Builder request = client.target(generateURL("/chunked")).request();
         Response response = request.get();
         String entity = response.readEntity(String.class);
-        Assert.assertEquals(200, response.getStatus());
-        Assert.assertEquals("onetwo", entity);
+        Assertions.assertEquals(200, response.getStatus());
+        Assertions.assertEquals("onetwo", entity);
     }
 
     @Test
     public void testInjection() {
         Integer data = client.target(generateURL("/injection")).request().get(Integer.class);
-        assertEquals((Integer) 42, data);
+        Assertions.assertEquals((Integer) 42, data);
 
         data = client.target(generateURL("/injection-async")).request().get(Integer.class);
-        assertEquals((Integer) 42, data);
+        Assertions.assertEquals((Integer) 42, data);
     }
 }
diff --git a/resteasy-rxjava2/src/test/java/org/jboss/resteasy/rxjava2/SingleProviderTest.java b/resteasy-rxjava2/src/test/java/org/jboss/resteasy/rxjava2/SingleProviderTest.java
index 84cb957cd1d..8bb8f22ad35 100644
--- a/resteasy-rxjava2/src/test/java/org/jboss/resteasy/rxjava2/SingleProviderTest.java
+++ b/resteasy-rxjava2/src/test/java/org/jboss/resteasy/rxjava2/SingleProviderTest.java
@@ -1,14 +1,11 @@
 package org.jboss.resteasy.rxjava2;
 
-import static org.junit.Assert.assertEquals;
-import static org.junit.Assert.assertFalse;
-import static org.junit.Assert.assertTrue;
-
 import java.util.concurrent.CompletableFuture;
 import java.util.concurrent.CountDownLatch;
 import java.util.concurrent.TimeUnit;
 
-import org.junit.Test;
+import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.Test;
 
 import io.reactivex.Single;
 
@@ -20,7 +17,7 @@ public void testFromCompletionStage() {
         final CompletableFuture<Integer> cs = new CompletableFuture<>();
         cs.complete(1);
         final Single<?> single = provider.fromCompletionStage(cs);
-        assertEquals(1, single.blockingGet());
+        Assertions.assertEquals(1, single.blockingGet());
     }
 
     @Test
@@ -28,9 +25,9 @@ public void testFromCompletionStageNotDeferred() throws InterruptedException {
         final CountDownLatch latch = new CountDownLatch(1);
         final Single<?> single = provider.fromCompletionStage(someAsyncMethod(latch));
 
-        assertTrue(latch.await(1, TimeUnit.SECONDS));
-        assertEquals("Hello!", single.blockingGet());
-        assertEquals(0, latch.getCount());
+        Assertions.assertTrue(latch.await(1, TimeUnit.SECONDS));
+        Assertions.assertEquals("Hello!", single.blockingGet());
+        Assertions.assertEquals(0, latch.getCount());
     }
 
     @Test
@@ -38,9 +35,9 @@ public void testFromCompletionStageDeferred() throws InterruptedException {
         final CountDownLatch latch = new CountDownLatch(1);
         final Single<?> single = provider.fromCompletionStage(() -> someAsyncMethod(latch));
 
-        assertFalse(latch.await(1, TimeUnit.SECONDS));
-        assertEquals("Hello!", single.blockingGet());
-        assertEquals(0, latch.getCount());
+        Assertions.assertFalse(latch.await(1, TimeUnit.SECONDS));
+        Assertions.assertEquals("Hello!", single.blockingGet());
+        Assertions.assertEquals(0, latch.getCount());
     }
 
     private CompletableFuture<String> someAsyncMethod(final CountDownLatch latch) {
@@ -51,6 +48,6 @@ private CompletableFuture<String> someAsyncMethod(final CountDownLatch latch) {
     @Test
     public void testToCompletionStageCase() throws Exception {
         final Object actual = provider.toCompletionStage(Single.just(1)).toCompletableFuture().get();
-        assertEquals(1, actual);
+        Assertions.assertEquals(1, actual);
     }
 }
diff --git a/resteasy-rxjava2/src/test/java/org/jboss/resteasy/test/i18n/TestMessagesAbstract.java b/resteasy-rxjava2/src/test/java/org/jboss/resteasy/test/i18n/TestMessagesAbstract.java
index 284a4031b2c..dddf4775ae1 100644
--- a/resteasy-rxjava2/src/test/java/org/jboss/resteasy/test/i18n/TestMessagesAbstract.java
+++ b/resteasy-rxjava2/src/test/java/org/jboss/resteasy/test/i18n/TestMessagesAbstract.java
@@ -7,8 +7,8 @@
 
 import org.jboss.logging.Logger;
 import org.jboss.resteasy.rxjava2.i18n.Messages;
-import org.junit.Assert;
-import org.junit.Test;
+import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.Test;
 
 /**
  *
@@ -33,7 +33,7 @@ public void testLocale() throws Exception {
             return;
         }
 
-        Assert.assertEquals(getExpected(BASE + "00", "expectedClientInvocationBuilder", "abc"),
+        Assertions.assertEquals(getExpected(BASE + "00", "expectedClientInvocationBuilder", "abc"),
                 Messages.MESSAGES.expectedClientInvocationBuilder("abc"));
     }
 
diff --git a/resteasy-rxjava2/src/test/java/org/jboss/resteasy/test/i18n/TestMessagesParent.java b/resteasy-rxjava2/src/test/java/org/jboss/resteasy/test/i18n/TestMessagesParent.java
index 36a70952685..60553dd1877 100644
--- a/resteasy-rxjava2/src/test/java/org/jboss/resteasy/test/i18n/TestMessagesParent.java
+++ b/resteasy-rxjava2/src/test/java/org/jboss/resteasy/test/i18n/TestMessagesParent.java
@@ -5,8 +5,8 @@
 import java.util.Properties;
 
 import org.jboss.logging.Logger;
-import org.junit.AfterClass;
-import org.junit.BeforeClass;
+import org.junit.jupiter.api.AfterAll;
+import org.junit.jupiter.api.BeforeAll;
 
 /**
  *
@@ -19,12 +19,12 @@ public abstract class TestMessagesParent {
     protected static Locale savedLocale;
     protected Properties properties = new Properties();
 
-    @BeforeClass
+    @BeforeAll
     public static void beforeClass() {
         savedLocale = Locale.getDefault();
     }
 
-    @AfterClass
+    @AfterAll
     public static void afterClass() {
         Locale.setDefault(savedLocale);
         LOG.info("Reset default locale to: " + savedLocale);