diff --git a/vaadin-spring/src/main/java/com/vaadin/flow/spring/VaadinServletContextInitializer.java b/vaadin-spring/src/main/java/com/vaadin/flow/spring/VaadinServletContextInitializer.java
index b23ef7739..2bcf808c7 100644
--- a/vaadin-spring/src/main/java/com/vaadin/flow/spring/VaadinServletContextInitializer.java
+++ b/vaadin-spring/src/main/java/com/vaadin/flow/spring/VaadinServletContextInitializer.java
@@ -428,9 +428,6 @@ public void failFastContextInitialized(ServletContextEvent event)
                                 + "run the build-frontend maven goal) or "
                                 + "include the vaadin-dev-server dependency");
             }
-            if (isDevModeAlreadyStarted(event.getServletContext())) {
-                return;
-            }
 
             Set<String> basePackages;
             if (isScanOnlySet()) {
@@ -490,21 +487,6 @@ private boolean isScanOnlySet() {
             return customScanOnly != null && !customScanOnly.isEmpty();
         }
 
-        private boolean isDevModeAlreadyStarted(ServletContext servletContext) {
-            if (devModeHandlerManager != null) {
-                VaadinServletContext vaadinContext = new VaadinServletContext(
-                        servletContext);
-                if (devModeHandlerManager
-                        .isDevModeAlreadyStarted(vaadinContext)) {
-                    if (getLogger().isDebugEnabled()) {
-                        getLogger().debug(
-                                "Skipped DevModeHandler initialization as it has been already initialized");
-                    }
-                    return true;
-                }
-            }
-            return false;
-        }
     }
 
     private class WebComponentServletContextListener
diff --git a/vaadin-spring/src/test/java/com/vaadin/flow/spring/VaadinServletContextInitializerTest.java b/vaadin-spring/src/test/java/com/vaadin/flow/spring/VaadinServletContextInitializerTest.java
index 1bbb80a50..4ace42d1e 100644
--- a/vaadin-spring/src/test/java/com/vaadin/flow/spring/VaadinServletContextInitializerTest.java
+++ b/vaadin-spring/src/test/java/com/vaadin/flow/spring/VaadinServletContextInitializerTest.java
@@ -87,9 +87,6 @@ public void onStartup_devModeNotInitialized_devModeInitialized()
             throws Exception {
         initDefaultMocks();
 
-        Mockito.when(
-                devModeHandlerManager.isDevModeAlreadyStarted(Mockito.any()))
-                .thenReturn(false);
         Mockito.when(devModeHandlerManager.getHandlesTypes())
                 .thenReturn(new Class<?>[0]);
 
@@ -107,32 +104,6 @@ public void onStartup_devModeNotInitialized_devModeInitialized()
                 Mockito.any(VaadinContext.class));
     }
 
-    @Test
-    public void onStartup_devModeAlreadyInitialized_devModeInitializationSkipped()
-            throws Exception {
-        initDefaultMocks();
-
-        Mockito.when(
-                devModeHandlerManager.isDevModeAlreadyStarted(Mockito.any()))
-                .thenReturn(true);
-        Mockito.when(devModeHandlerManager.getHandlesTypes())
-                .thenReturn(new Class<?>[0]);
-
-        Mockito.when(appConfig.enableDevServer()).thenReturn(true);
-
-        VaadinServletContextInitializer vaadinServletContextInitializer = getStubbedVaadinServletContextInitializer();
-
-        // Simulate Spring context start only
-        vaadinServletContextInitializer.onStartup(servletContext);
-
-        // In our case, we want to check if Dev Mode has been started within
-        // onStartup() call, that means DevModeInitializer.initDevModeHandler()
-        // should not have been called.
-        Mockito.verify(devModeHandlerManager, Mockito.never())
-                .initDevModeHandler(Mockito.any(),
-                        Mockito.any(VaadinContext.class));
-    }
-
     @Test
     public void errorParameterServletContextListenerEvent_defaultRouteNotFoundView_defaultRouteNotFoundViewIsRegistered()
             throws Exception {