diff --git a/spring-context/src/test/java/org/springframework/context/annotation/ConfigurationClassPostProcessorTests.java b/spring-context/src/test/java/org/springframework/context/annotation/ConfigurationClassPostProcessorTests.java
index 56373e04eb..19f96e8caf 100644
--- a/spring-context/src/test/java/org/springframework/context/annotation/ConfigurationClassPostProcessorTests.java
+++ b/spring-context/src/test/java/org/springframework/context/annotation/ConfigurationClassPostProcessorTests.java
@@ -37,6 +37,7 @@ import org.springframework.beans.factory.BeanCreationException;
 import org.springframework.beans.factory.BeanDefinitionStoreException;
 import org.springframework.beans.factory.FactoryBean;
 import org.springframework.beans.factory.NoSuchBeanDefinitionException;
+import org.springframework.beans.factory.ObjectProvider;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor;
 import org.springframework.beans.factory.annotation.Lookup;
@@ -351,7 +352,7 @@ public class ConfigurationClassPostProcessorTests {
 		}
 	}
 
-	@Test
+	@Test  // SPR-15384
 	public void nestedConfigurationClassesProcessedInCorrectOrder() {
 		beanFactory.registerBeanDefinition("config", new RootBeanDefinition(ConfigWithOrderedNestedClasses.class));
 		ConfigurationClassPostProcessor pp = new ConfigurationClassPostProcessor();
@@ -363,6 +364,19 @@ public class ConfigurationClassPostProcessorTests {
 		assertSame(foo, bar.foo);
 	}
 
+	@Test  // SPR-16734
+	public void innerConfigurationClassesProcessedInCorrectOrder() {
+		beanFactory.registerBeanDefinition("config", new RootBeanDefinition(ConfigWithOrderedInnerClasses.class));
+		ConfigurationClassPostProcessor pp = new ConfigurationClassPostProcessor();
+		pp.postProcessBeanFactory(beanFactory);
+		beanFactory.addBeanPostProcessor(new AutowiredAnnotationBeanPostProcessor());
+
+		Foo foo = beanFactory.getBean(Foo.class);
+		assertTrue(foo instanceof ExtendedFoo);
+		Bar bar = beanFactory.getBean(Bar.class);
+		assertSame(foo, bar.foo);
+	}
+
 	@Test
 	public void scopedProxyTargetMarkedAsNonAutowireCandidate() {
 		AutowiredAnnotationBeanPostProcessor bpp = new AutowiredAnnotationBeanPostProcessor();
@@ -890,6 +904,43 @@ public class ConfigurationClassPostProcessorTests {
 		}
 	}
 
+	@Configuration
+	static class ConfigWithOrderedInnerClasses {
+
+		@Configuration
+		@Order(1)
+		class SingletonBeanConfig {
+
+			public SingletonBeanConfig(ConfigWithOrderedInnerClasses other) {
+			}
+
+			public @Bean Foo foo() {
+				return new Foo();
+			}
+
+			public @Bean Bar bar() {
+				return new Bar(foo());
+			}
+		}
+
+		@Configuration
+		@Order(2)
+		class OverridingSingletonBeanConfig {
+
+			public OverridingSingletonBeanConfig(ObjectProvider<SingletonBeanConfig> other) {
+				other.getObject();
+			}
+
+			public @Bean ExtendedFoo foo() {
+				return new ExtendedFoo();
+			}
+
+			public @Bean Bar bar() {
+				return new Bar(foo());
+			}
+		}
+	}
+
 	static class Foo {
 	}