diff --git a/grpcmock-junit5/src/main/java/org/grpcmock/junit5/GrpcMockExtension.java b/grpcmock-junit5/src/main/java/org/grpcmock/junit5/GrpcMockExtension.java
index 7042865..dc1a26d 100644
--- a/grpcmock-junit5/src/main/java/org/grpcmock/junit5/GrpcMockExtension.java
+++ b/grpcmock-junit5/src/main/java/org/grpcmock/junit5/GrpcMockExtension.java
@@ -18,6 +18,7 @@
 import org.junit.jupiter.api.extension.AfterEachCallback;
 import org.junit.jupiter.api.extension.BeforeAllCallback;
 import org.junit.jupiter.api.extension.ExtensionContext;
+import org.junit.platform.commons.support.ModifierSupport;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
@@ -73,6 +74,9 @@ public void beforeAll(ExtensionContext extensionContext) {
 
   @Override
   public void afterAll(ExtensionContext extensionContext) {
+    if (extensionContext.getTestClass().map(this::isNestedClass).orElse(Boolean.FALSE)) {
+      return;
+    }
     server.resetAll();
     server.stop();
     log.debug("Stopping gRPC Mock server.");
@@ -84,6 +88,10 @@ public void afterEach(ExtensionContext extensionContext) {
     log.debug("Resetting all stub mappings after a test");
   }
 
+  private boolean isNestedClass(Class<?> currentClass) {
+    return !ModifierSupport.isStatic(currentClass) && currentClass.isMemberClass();
+  }
+
   public static class Builder {
 
     private int port = 0;
@@ -122,8 +130,8 @@ public Builder withInterceptor(@Nonnull ServerInterceptor interceptor) {
     }
 
     /**
-     * Defines certChain and privateKey files in order to configure server security via {@link
-     * ServerBuilder#useTransportSecurity(File, File)}.
+     * Defines certChain and privateKey files in order to configure server security via
+     * {@link ServerBuilder#useTransportSecurity(File, File)}.
      */
     public Builder withTransportSecurity(@Nonnull File certChain, @Nonnull File privateKey) {
       Objects.requireNonNull(certChain);
@@ -134,8 +142,8 @@ public Builder withTransportSecurity(@Nonnull File certChain, @Nonnull File priv
     }
 
     /**
-     * Defines certChain and privateKey files in order to configure server security via {@link
-     * ServerBuilder#useTransportSecurity(File, File)}.
+     * Defines certChain and privateKey files in order to configure server security via
+     * {@link ServerBuilder#useTransportSecurity(File, File)}.
      */
     public Builder withTransportSecurity(@Nonnull String certChain, @Nonnull String privateKey) {
       Objects.requireNonNull(certChain);
diff --git a/grpcmock-junit5/src/test/java/org/grpcmock/junit5/test/NestedTest.java b/grpcmock-junit5/src/test/java/org/grpcmock/junit5/test/NestedTest.java
new file mode 100644
index 0000000..45ad73b
--- /dev/null
+++ b/grpcmock-junit5/src/test/java/org/grpcmock/junit5/test/NestedTest.java
@@ -0,0 +1,31 @@
+package org.grpcmock.junit5.test;
+
+import org.grpcmock.junit5.GrpcMockExtension;
+import org.junit.jupiter.api.Nested;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.ExtendWith;
+
+/**
+ * @author Fadelis
+ */
+@ExtendWith(GrpcMockExtension.class)
+class NestedTest extends TestBase {
+
+  @Nested
+  class FirstNestedClass {
+
+    @Test
+    void should_run_nested_test_1() {
+      runAndAssertSimpleHealthCheckRequest();
+    }
+  }
+
+  @Nested
+  class SecondNestedClass {
+
+    @Test
+    void should_run_nested_test_2() {
+      runAndAssertSimpleHealthCheckRequest();
+    }
+  }
+}
diff --git a/grpcmock-junit5/src/test/java/org/grpcmock/junit5/test/TestBase.java b/grpcmock-junit5/src/test/java/org/grpcmock/junit5/test/TestBase.java
index fbf9663..7fd0463 100644
--- a/grpcmock-junit5/src/test/java/org/grpcmock/junit5/test/TestBase.java
+++ b/grpcmock-junit5/src/test/java/org/grpcmock/junit5/test/TestBase.java
@@ -38,7 +38,7 @@ void tearDownChannel() {
   void runAndAssertHealthCheckRequest(HealthCheckRequest request, HealthCheckResponse response) {
     HealthBlockingStub serviceStub = HealthGrpc.newBlockingStub(serverChannel);
 
-    assertThat(serviceStub.check(HealthCheckRequest.getDefaultInstance())).isEqualTo(response);
+    assertThat(serviceStub.check(request)).isEqualTo(response);
   }
 
   void runAndAssertSimpleHealthCheckRequest() {