diff --git a/impl/src/main/java/org/jboss/weld/event/ObserverMethodImpl.java b/impl/src/main/java/org/jboss/weld/event/ObserverMethodImpl.java
index f65eac2723..2a07863d72 100644
--- a/impl/src/main/java/org/jboss/weld/event/ObserverMethodImpl.java
+++ b/impl/src/main/java/org/jboss/weld/event/ObserverMethodImpl.java
@@ -32,7 +32,7 @@
 import jakarta.enterprise.inject.Disposes;
 import jakarta.enterprise.inject.Instance;
 import jakarta.enterprise.inject.Produces;
-import jakarta.enterprise.inject.spi.BeanManager;
+import jakarta.enterprise.inject.spi.BeanContainer;
 import jakarta.enterprise.inject.spi.EventMetadata;
 import jakarta.enterprise.inject.spi.ObserverMethod;
 import jakarta.enterprise.inject.spi.WithAnnotations;
@@ -234,7 +234,7 @@ private <Y> void checkObserverMethod(EnhancedAnnotatedMethod<T, Y> annotated) {
             // if this is an observer method for container lifecycle event, it must not inject anything besides BeanManager
             if (containerLifecycleObserverMethod && !parameter.isAnnotationPresent(Observes.class)
                     && !parameter.isAnnotationPresent(ObservesAsync.class)
-                    && !BeanManager.class.equals(parameter.getBaseType())) {
+                    && !parameter.getTypeClosure().contains(BeanContainer.class)) {
                 throw EventLogger.LOG.invalidInjectionPoint(this, Formats.formatAsStackTraceElement(annotated.getJavaMember()));
             }
         }
diff --git a/tests-arquillian/src/test/java/org/jboss/weld/tests/extensions/ExtensionTest.java b/tests-arquillian/src/test/java/org/jboss/weld/tests/extensions/ExtensionTest.java
index b7b4cd4eec..75bd6450c8 100644
--- a/tests-arquillian/src/test/java/org/jboss/weld/tests/extensions/ExtensionTest.java
+++ b/tests-arquillian/src/test/java/org/jboss/weld/tests/extensions/ExtensionTest.java
@@ -52,6 +52,14 @@ public void testExtensionInjectableAsBean(SimpleExtension extension) {
         assertTrue(extension.isObservedBeforeBeanDiscovery());
     }
 
+    @Test
+    public void testBeanManagerInjectionAsOptionalParam() {
+        assertTrue(SimpleExtension.observedBeforeBeanDiscoveryBc);
+        assertTrue(SimpleExtension.observedBeforeBeanDiscoveryBm);
+        assertTrue(SimpleExtension.observedBeforeBeanDiscoveryWm);
+        assertTrue(SimpleExtension.observedBeforeBeanDiscoveryElBm);
+    }
+
     /*
      * description = "WELD-572"
      */
diff --git a/tests-arquillian/src/test/java/org/jboss/weld/tests/extensions/SimpleExtension.java b/tests-arquillian/src/test/java/org/jboss/weld/tests/extensions/SimpleExtension.java
index bd40db5d3d..83879caa31 100644
--- a/tests-arquillian/src/test/java/org/jboss/weld/tests/extensions/SimpleExtension.java
+++ b/tests-arquillian/src/test/java/org/jboss/weld/tests/extensions/SimpleExtension.java
@@ -17,26 +17,54 @@
 package org.jboss.weld.tests.extensions;
 
 import jakarta.enterprise.event.Observes;
+import jakarta.enterprise.inject.spi.BeanContainer;
 import jakarta.enterprise.inject.spi.BeanManager;
 import jakarta.enterprise.inject.spi.BeforeBeanDiscovery;
 import jakarta.enterprise.inject.spi.BeforeShutdown;
 import jakarta.enterprise.inject.spi.Extension;
+import jakarta.enterprise.inject.spi.el.ELAwareBeanManager;
+
+import org.jboss.weld.manager.api.WeldManager;
 
 public class SimpleExtension implements Extension {
 
     private static boolean observedBeforeBeanDiscovery;
-
-    public void observe(@Observes BeforeBeanDiscovery event) {
-        observedBeforeBeanDiscovery = true;
-    }
+    public static boolean observedBeforeBeanDiscoveryBc;
+    public static boolean observedBeforeBeanDiscoveryBm;
+    public static boolean observedBeforeBeanDiscoveryWm;
+    public static boolean observedBeforeBeanDiscoveryElBm;
 
     public static boolean isObservedBeforeBeanDiscovery() {
         return observedBeforeBeanDiscovery;
     }
 
-    public void observeBeforeShutdown(@Observes BeforeShutdown beforeShutdown, BeanManager beanManager) {
+    public void observeBeforeShutdown(@Observes BeforeShutdown beforeShutdown, WeldManager beanManager) {
         assert beanManager != null;
         assert beanManager.getELResolver() != null;
     }
 
+    public void observeBeanManager(@Observes BeforeBeanDiscovery event) {
+        observedBeforeBeanDiscovery = true;
+    }
+
+    public void observeBeanManager(@Observes BeforeBeanDiscovery event, BeanManager bm) {
+        observedBeforeBeanDiscoveryBm = true;
+        assert bm != null;
+    }
+
+    public void observeBeanManager(@Observes BeforeBeanDiscovery event, BeanContainer bc) {
+        observedBeforeBeanDiscoveryBc = true;
+        assert bc != null;
+    }
+
+    public void observeBeanManager(@Observes BeforeBeanDiscovery event, WeldManager wm) {
+        observedBeforeBeanDiscoveryWm = true;
+        assert wm != null;
+    }
+
+    public void observeBeanManager(@Observes BeforeBeanDiscovery event, ELAwareBeanManager bm) {
+        observedBeforeBeanDiscoveryElBm = true;
+        assert bm != null;
+    }
+
 }