diff --git a/spring-boot/src/main/java/org/springframework/boot/SpringApplication.java b/spring-boot/src/main/java/org/springframework/boot/SpringApplication.java
index 8848afb0817..366273cd09e 100644
--- a/spring-boot/src/main/java/org/springframework/boot/SpringApplication.java
+++ b/spring-boot/src/main/java/org/springframework/boot/SpringApplication.java
@@ -155,8 +155,6 @@ public class SpringApplication {
 
 	private Set<Object> sources = new LinkedHashSet<Object>();
 
-	private Set<Object> initialSources = new LinkedHashSet<Object>();
-
 	private Class<?> mainApplicationClass;
 
 	private boolean showBanner = true;
@@ -211,7 +209,7 @@ public class SpringApplication {
 
 	private void initialize(Object[] sources) {
 		if (sources != null && sources.length > 0) {
-			this.initialSources.addAll(Arrays.asList(sources));
+			this.sources.addAll(Arrays.asList(sources));
 		}
 		this.webEnvironment = deduceWebEnvironment();
 		this.initializers = new LinkedHashSet<ApplicationContextInitializer<?>>();
@@ -301,7 +299,7 @@ public class SpringApplication {
 
 			// Call all remaining initializers
 			callEnvironmentAwareSpringApplicationInitializers(args, environment);
-			Set<Object> sources = assembleSources();
+			Set<Object> sources = getSources();
 			Assert.notEmpty(sources, "Sources must not be empty");
 			if (this.showBanner) {
 				printBanner();
@@ -366,13 +364,6 @@ public class SpringApplication {
 		}
 	}
 
-	private Set<Object> assembleSources() {
-		LinkedHashSet<Object> sources = new LinkedHashSet<Object>();
-		sources.addAll(this.sources);
-		sources.addAll(this.initialSources);
-		return sources;
-	}
-
 	private void callNonEnvironmentAwareSpringApplicationInitializers(String[] args) {
 		for (ApplicationContextInitializer<?> initializer : getInitializers()) {
 			if (initializer instanceof SpringApplicationInitializer
@@ -727,7 +718,7 @@ public class SpringApplication {
 	 */
 	public void setSources(Set<Object> sources) {
 		Assert.notNull(sources, "Sources must not be null");
-		this.sources = new LinkedHashSet<Object>(sources);
+		this.sources.addAll(sources);
 	}
 
 	/**
diff --git a/spring-boot/src/test/java/org/springframework/boot/SpringApplicationTests.java b/spring-boot/src/test/java/org/springframework/boot/SpringApplicationTests.java
index e2d8f57f8a0..0805c09138e 100644
--- a/spring-boot/src/test/java/org/springframework/boot/SpringApplicationTests.java
+++ b/spring-boot/src/test/java/org/springframework/boot/SpringApplicationTests.java
@@ -52,7 +52,6 @@ import org.springframework.core.env.PropertySource;
 import org.springframework.core.env.StandardEnvironment;
 import org.springframework.core.io.DefaultResourceLoader;
 import org.springframework.core.io.ResourceLoader;
-import org.springframework.test.util.ReflectionTestUtils;
 import org.springframework.util.StringUtils;
 
 import static org.hamcrest.Matchers.equalTo;
@@ -322,9 +321,7 @@ public class SpringApplicationTests {
 		application.setWebEnvironment(false);
 		application.setUseMockLoader(true);
 		application.run();
-		@SuppressWarnings("unchecked")
-		Set<Object> initialSources = (Set<Object>) ReflectionTestUtils.getField(
-				application, "initialSources");
+		Set<Object> initialSources = application.getSources();
 		assertThat(initialSources.toArray(), equalTo(sources));
 	}