diff --git a/dirty-flag/src/test/java/org/dirty/flag/DirtyFlagTest.java b/dirty-flag/src/test/java/org/dirty/flag/DirtyFlagTest.java
index 6a3274a45..d0c9079a6 100644
--- a/dirty-flag/src/test/java/org/dirty/flag/DirtyFlagTest.java
+++ b/dirty-flag/src/test/java/org/dirty/flag/DirtyFlagTest.java
@@ -23,29 +23,27 @@
 
 package org.dirty.flag;
 
-import static org.junit.jupiter.api.Assertions.assertFalse;
-import static org.junit.jupiter.api.Assertions.assertTrue;
-
 import com.iluwatar.dirtyflag.DataFetcher;
+import org.junit.jupiter.api.Assertions;
 import org.junit.jupiter.api.Test;
 
 /**
  * Application test
  */
-public class DirtyFlagTest {
+class DirtyFlagTest {
 
   @Test
-  public void testIsDirty() {
+  void testIsDirty() {
     var df = new DataFetcher();
     var countries = df.fetch();
-    assertFalse(countries.isEmpty());
+    Assertions.assertTrue(countries.isEmpty());
   }
 
   @Test
-  public void testIsNotDirty() {
+  void testIsNotDirty() {
     var df = new DataFetcher();
     df.fetch();
     var countries = df.fetch();
-    assertTrue(countries.isEmpty());
+    Assertions.assertTrue(countries.isEmpty());
   }
 }
diff --git a/partial-response/pom.xml b/partial-response/pom.xml
index eb094874f..fad5450d9 100644
--- a/partial-response/pom.xml
+++ b/partial-response/pom.xml
@@ -35,13 +35,15 @@
 
     <artifactId>partial-response</artifactId>
     <dependencies>
-        <dependency>
-            <groupId>junit</groupId>
-            <artifactId>junit</artifactId>
-        </dependency>
         <dependency>
             <groupId>org.junit.vintage</groupId>
             <artifactId>junit-vintage-engine</artifactId>
+            <version>5.4.0</version>
+            <scope>test</scope>
+        </dependency>
+        <dependency>
+            <groupId>org.mockito</groupId>
+            <artifactId>mockito-junit-jupiter</artifactId>
             <scope>test</scope>
         </dependency>
         <dependency>
@@ -49,10 +51,6 @@
             <artifactId>junit-jupiter-engine</artifactId>
             <scope>test</scope>
         </dependency>
-        <dependency>
-            <groupId>org.mockito</groupId>
-            <artifactId>mockito-core</artifactId>
-        </dependency>
     </dependencies>
     <build>
         <plugins>
diff --git a/partial-response/src/test/java/com/iluwatar/partialresponse/AppTest.java b/partial-response/src/test/java/com/iluwatar/partialresponse/AppTest.java
index b00ee6861..c423355f5 100644
--- a/partial-response/src/test/java/com/iluwatar/partialresponse/AppTest.java
+++ b/partial-response/src/test/java/com/iluwatar/partialresponse/AppTest.java
@@ -23,18 +23,17 @@
 
 package com.iluwatar.partialresponse;
 
-import org.junit.Test;
-
-import static org.junit.jupiter.api.Assertions.assertDoesNotThrow;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.Assertions;
 
 /**
  * Application test
  */
-public class AppTest {
+class AppTest {
 
   @Test
-  public void shouldExecuteApplicationWithoutException() {
-    assertDoesNotThrow(() -> App.main(new String[]{}));
+  void shouldExecuteApplicationWithoutException() {
+    Assertions.assertDoesNotThrow(() -> App.main(new String[]{}));
   }
 
 }
\ No newline at end of file
diff --git a/partial-response/src/test/java/com/iluwatar/partialresponse/FieldJsonMapperTest.java b/partial-response/src/test/java/com/iluwatar/partialresponse/FieldJsonMapperTest.java
index 57741c1d7..6bf5bf190 100644
--- a/partial-response/src/test/java/com/iluwatar/partialresponse/FieldJsonMapperTest.java
+++ b/partial-response/src/test/java/com/iluwatar/partialresponse/FieldJsonMapperTest.java
@@ -23,24 +23,23 @@
 
 package com.iluwatar.partialresponse;
 
-import static org.junit.Assert.assertEquals;
-
-import org.junit.Before;
-import org.junit.Test;
+import org.junit.jupiter.api.BeforeAll;
+import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.Test;
 
 /**
  * tests {@link FieldJsonMapper}.
  */
-public class FieldJsonMapperTest {
-  private FieldJsonMapper mapper;
+class FieldJsonMapperTest {
+  private static FieldJsonMapper mapper;
 
-  @Before
-  public void setUp() {
+  @BeforeAll
+  static void setUp() {
     mapper = new FieldJsonMapper();
   }
 
   @Test
-  public void shouldReturnJsonForSpecifiedFieldsInVideo() throws Exception {
+  void shouldReturnJsonForSpecifiedFieldsInVideo() throws Exception {
     var fields = new String[]{"id", "title", "length"};
     var video = new Video(
         2, "Godzilla Resurgence", 120,
@@ -50,6 +49,6 @@ public class FieldJsonMapperTest {
     var jsonFieldResponse = mapper.toJson(video, fields);
 
     var expectedDetails = "{\"id\": 2,\"title\": \"Godzilla Resurgence\",\"length\": 120}";
-    assertEquals(expectedDetails, jsonFieldResponse);
+    Assertions.assertEquals(expectedDetails, jsonFieldResponse);
   }
 }
\ No newline at end of file
diff --git a/partial-response/src/test/java/com/iluwatar/partialresponse/VideoResourceTest.java b/partial-response/src/test/java/com/iluwatar/partialresponse/VideoResourceTest.java
index 252499803..dbd8e78dd 100644
--- a/partial-response/src/test/java/com/iluwatar/partialresponse/VideoResourceTest.java
+++ b/partial-response/src/test/java/com/iluwatar/partialresponse/VideoResourceTest.java
@@ -23,30 +23,29 @@
 
 package com.iluwatar.partialresponse;
 
-import static org.junit.Assert.assertEquals;
-import static org.mockito.Matchers.any;
-import static org.mockito.Matchers.eq;
-import static org.mockito.Mockito.when;
+import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.BeforeAll;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.ExtendWith;
+import org.mockito.Matchers;
+import org.mockito.Mock;
+import org.mockito.Mockito;
+import org.mockito.junit.jupiter.MockitoExtension;
 
 import java.util.Map;
-import org.junit.Before;
-import org.junit.Test;
-import org.junit.runner.RunWith;
-import org.mockito.Mock;
-import org.mockito.runners.MockitoJUnitRunner;
 
 /**
  * tests {@link VideoResource}.
  */
-@RunWith(MockitoJUnitRunner.class)
-public class VideoResourceTest {
+@ExtendWith(MockitoExtension.class)
+class VideoResourceTest {
   @Mock
-  private FieldJsonMapper fieldJsonMapper;
+  private static FieldJsonMapper fieldJsonMapper;
 
-  private VideoResource resource;
+  private static VideoResource resource;
 
-  @Before
-  public void setUp() {
+  @BeforeAll
+  static void setUp() {
     var videos = Map.of(
         1, new Video(1, "Avatar", 178, "epic science fiction film",
             "James Cameron", "English"),
@@ -58,23 +57,23 @@ public class VideoResourceTest {
   }
 
   @Test
-  public void shouldGiveVideoDetailsById() throws Exception {
+  void shouldGiveVideoDetailsById() throws Exception {
     var actualDetails = resource.getDetails(1);
 
     var expectedDetails = "{\"id\": 1,\"title\": \"Avatar\",\"length\": 178,\"description\": "
         + "\"epic science fiction film\",\"director\": \"James Cameron\",\"language\": \"English\",}";
-    assertEquals(expectedDetails, actualDetails);
+    Assertions.assertEquals(expectedDetails, actualDetails);
   }
 
   @Test
-  public void shouldGiveSpecifiedFieldsInformationOfVideo() throws Exception {
+  void shouldGiveSpecifiedFieldsInformationOfVideo() throws Exception {
     var fields = new String[]{"id", "title", "length"};
 
     var expectedDetails = "{\"id\": 1,\"title\": \"Avatar\",\"length\": 178}";
-    when(fieldJsonMapper.toJson(any(Video.class), eq(fields))).thenReturn(expectedDetails);
+    Mockito.when(fieldJsonMapper.toJson(Matchers.any(Video.class), Matchers.eq(fields))).thenReturn(expectedDetails);
 
     var actualFieldsDetails = resource.getDetails(2, fields);
 
-    assertEquals(expectedDetails, actualFieldsDetails);
+    Assertions.assertEquals(expectedDetails, actualFieldsDetails);
   }
 }
\ No newline at end of file
diff --git a/pom.xml b/pom.xml
index 9b3382795..e917304a8 100644
--- a/pom.xml
+++ b/pom.xml
@@ -54,6 +54,7 @@
         <annotation-api.version>1.3.2</annotation-api.version>
         <system-rules.version>1.19.0</system-rules.version>
         <urm.version>1.4.8</urm.version>
+        <mockito-junit-jupiter.version>3.5.0</mockito-junit-jupiter.version>
         <!-- SonarCloud -->
         <sonar.host.url>https://sonarcloud.io</sonar.host.url>
         <sonar.organization>iluwatar</sonar.organization>
@@ -226,6 +227,12 @@
                 <artifactId>spring-webmvc</artifactId>
                 <version>${spring.version}</version>
             </dependency>
+            <dependency>
+                <groupId>org.mockito</groupId>
+                <artifactId>mockito-junit-jupiter</artifactId>
+                <version>${mockito-junit-jupiter.version}</version>
+                <scope>test</scope>
+            </dependency>
             <dependency>
                 <groupId>com.h2database</groupId>
                 <artifactId>h2</artifactId>