diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 97c330a625..62d2814639 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -30,6 +30,8 @@ jobs:
         run: mvn install -DskipTests=true -DskipITs=true -Darchetype.test.skip=true -Dmaven.javadoc.skip=true -B -V --toolchains .github/workflows/.toolchains.xml
       - name: test
         run: mvn verify -P-spotless-apply --toolchains .github/workflows/.toolchains.xml
+      - name: test cdi2-weld
+        run: cd cdi2 && mvn verify -Pcdi2-weld --toolchains ../.github/workflows/.toolchains.xml
 
   javadoc:
     name: 'Javadoc'
diff --git a/cdi2/README.md b/cdi2/README.md
index b8d2ac9d12..1f8ab9772e 100644
--- a/cdi2/README.md
+++ b/cdi2/README.md
@@ -27,7 +27,7 @@ And for Weld it is:
 <dependency>
   <groupId>org.jboss.weld.se</groupId>
   <artifactId>weld-se-core</artifactId>
-  <version>3.1.1.Final</version>
+  <version>4.0.0.Final</version>
   <scope>test</scope>
 </dependency>
 ```
diff --git a/cdi2/src/main/java/io/cucumber/cdi2/Cdi2Factory.java b/cdi2/src/main/java/io/cucumber/cdi2/Cdi2Factory.java
index ec15e0bf22..527cd77776 100644
--- a/cdi2/src/main/java/io/cucumber/cdi2/Cdi2Factory.java
+++ b/cdi2/src/main/java/io/cucumber/cdi2/Cdi2Factory.java
@@ -16,12 +16,14 @@
 public final class Cdi2Factory implements ObjectFactory {
 
     private final Map<Class<?>, Unmanaged.UnmanagedInstance<?>> standaloneInstances = new HashMap<>();
-    private SeContainerInitializer initializer;
     private SeContainer container;
 
     @Override
     public void start() {
-        container = getInitializer().initialize();
+        if (container == null) {
+            SeContainerInitializer initializer = SeContainerInitializer.newInstance();
+            container = initializer.initialize();
+        }
     }
 
     @Override
@@ -29,35 +31,26 @@ public void stop() {
         if (container != null) {
             container.close();
             container = null;
-            initializer = null;
         }
-        for (final Unmanaged.UnmanagedInstance<?> unmanaged : standaloneInstances.values()) {
+        for (Unmanaged.UnmanagedInstance<?> unmanaged : standaloneInstances.values()) {
             unmanaged.preDestroy();
             unmanaged.dispose();
         }
         standaloneInstances.clear();
     }
 
-    private SeContainerInitializer getInitializer() {
-        if (initializer == null) {
-            initializer = SeContainerInitializer.newInstance();
-        }
-        return initializer;
-    }
-
     @Override
     public boolean addClass(final Class<?> clazz) {
-        getInitializer().addBeanClasses(clazz);
         return true;
     }
 
     @Override
     public <T> T getInstance(final Class<T> type) {
-        final Unmanaged.UnmanagedInstance<?> instance = standaloneInstances.get(type);
+        Unmanaged.UnmanagedInstance<?> instance = standaloneInstances.get(type);
         if (instance != null) {
             return type.cast(instance.get());
         }
-        final Instance<T> selected = container.select(type);
+        Instance<T> selected = container.select(type);
         if (selected.isUnsatisfied()) {
             BeanManager beanManager = container.getBeanManager();
             Unmanaged<T> unmanaged = new Unmanaged<>(beanManager, type);
diff --git a/cdi2/src/test/java/io/cucumber/cdi2/Cdi2FactoryTest.java b/cdi2/src/test/java/io/cucumber/cdi2/Cdi2FactoryTest.java
index c3aea7135d..d9ef740135 100644
--- a/cdi2/src/test/java/io/cucumber/cdi2/Cdi2FactoryTest.java
+++ b/cdi2/src/test/java/io/cucumber/cdi2/Cdi2FactoryTest.java
@@ -1,10 +1,12 @@
 package io.cucumber.cdi2;
 
 import io.cucumber.core.backend.ObjectFactory;
+import org.junit.jupiter.api.AfterEach;
 import org.junit.jupiter.api.Test;
 
 import javax.enterprise.context.ApplicationScoped;
 import javax.enterprise.inject.Vetoed;
+import javax.inject.Inject;
 
 import static org.hamcrest.MatcherAssert.assertThat;
 import static org.hamcrest.core.Is.is;
@@ -12,12 +14,26 @@
 import static org.hamcrest.core.IsNot.not;
 import static org.hamcrest.core.IsNull.notNullValue;
 import static org.junit.jupiter.api.Assertions.assertAll;
-import static org.junit.jupiter.api.Assertions.assertNotNull;
+import static org.junit.jupiter.api.Assertions.assertDoesNotThrow;
 
 class Cdi2FactoryTest {
 
     final ObjectFactory factory = new Cdi2Factory();
 
+    @AfterEach
+    void stop(){
+        factory.stop();
+    }
+
+    @Test
+    void lifecycleIsIdempotent(){
+        assertDoesNotThrow(factory::stop);
+        factory.start();
+        assertDoesNotThrow(factory::start);
+        factory.stop();
+        assertDoesNotThrow(factory::stop);
+    }
+
     @Vetoed
     static class VetoedBean {
 
@@ -25,8 +41,6 @@ static class VetoedBean {
 
     @Test
     void shouldCreateNewInstancesForEachScenario() {
-        factory.addClass(VetoedBean.class);
-
         // Scenario 1
         factory.start();
         VetoedBean a1 = factory.getInstance(VetoedBean.class);
@@ -54,28 +68,46 @@ static class ApplicationScopedBean {
 
     @Test
     void shouldCreateApplicationScopedInstance() {
-        factory.addClass(ApplicationScopedBean.class);
         factory.start();
-        ApplicationScopedBean cdiStep = factory.getInstance(ApplicationScopedBean.class);
+        ApplicationScopedBean bean = factory.getInstance(ApplicationScopedBean.class);
         assertAll(
             // assert that it is is a CDI proxy
-            () -> assertThat(cdiStep.getClass(), not(is(ApplicationScopedBean.class))),
-            () -> assertThat(cdiStep.getClass().getSuperclass(), is(ApplicationScopedBean.class)));
+            () -> assertThat(bean.getClass(), not(is(ApplicationScopedBean.class))),
+            () -> assertThat(bean.getClass().getSuperclass(), is(ApplicationScopedBean.class)));
         factory.stop();
     }
 
+    static class UnmanagedBean {
+
+    }
+
     @Test
     void shouldCreateUnmanagedInstance() {
-        factory.addClass(UnmanagedBean.class);
         factory.start();
-        assertNotNull(factory.getInstance(UnmanagedBean.class));
-        UnmanagedBean cdiStep = factory.getInstance(UnmanagedBean.class);
-        assertThat(cdiStep.getClass(), is(UnmanagedBean.class));
+        UnmanagedBean bean = factory.getInstance(UnmanagedBean.class);
+        assertThat(bean.getClass(), is(UnmanagedBean.class));
         factory.stop();
     }
 
-    static class UnmanagedBean {
+    static class OtherStepDefinitions {
+
+    }
+
+    static class StepDefinitions {
+
+        @Inject
+        OtherStepDefinitions injected;
 
     }
 
+    @Test
+    void shouldInjectStepDefinitions() {
+        factory.addClass(OtherStepDefinitions.class);
+        factory.addClass(StepDefinitions.class);
+        factory.start();
+        StepDefinitions stepDefinitions = factory.getInstance(StepDefinitions.class);
+        assertThat(stepDefinitions.injected, is(notNullValue()));
+        factory.stop();
+    }
+
 }