diff --git a/packages/core/src/defer/dom_triggers.ts b/packages/core/src/defer/dom_triggers.ts
index 5a1b74d4901d3..cbe727e1216ce 100644
--- a/packages/core/src/defer/dom_triggers.ts
+++ b/packages/core/src/defer/dom_triggers.ts
@@ -47,10 +47,10 @@ const interactionTriggers = new WeakMap<Element, DeferEventEntry>();
 const viewportTriggers = new WeakMap<Element, DeferEventEntry>();
 
 /** Names of the events considered as interaction events. */
-const interactionEventNames = ['click', 'keydown'] as const;
+export const interactionEventNames = ['click', 'keydown'] as const;
 
 /** Names of the events considered as hover events. */
-const hoverEventNames = ['mouseenter', 'focusin'] as const;
+export const hoverEventNames = ['mouseenter', 'mouseover', 'focusin'] as const;
 
 /** `IntersectionObserver` used to observe `viewport` triggers. */
 let intersectionObserver: IntersectionObserver | null = null;
diff --git a/packages/core/test/acceptance/defer_spec.ts b/packages/core/test/acceptance/defer_spec.ts
index bdb0dec480114..ce10820403cb5 100644
--- a/packages/core/test/acceptance/defer_spec.ts
+++ b/packages/core/test/acceptance/defer_spec.ts
@@ -3027,8 +3027,9 @@ describe('@defer', () => {
       fixture.detectChanges();
       flush();
 
-      expect(spy).toHaveBeenCalledTimes(2);
+      expect(spy).toHaveBeenCalledTimes(3);
       expect(spy).toHaveBeenCalledWith('mouseenter', jasmine.any(Function), jasmine.any(Object));
+      expect(spy).toHaveBeenCalledWith('mouseover', jasmine.any(Function), jasmine.any(Object));
       expect(spy).toHaveBeenCalledWith('focusin', jasmine.any(Function), jasmine.any(Object));
     }));
 
@@ -3062,8 +3063,9 @@ describe('@defer', () => {
       fixture.componentInstance.renderBlock = false;
       fixture.detectChanges();
 
-      expect(spy).toHaveBeenCalledTimes(2);
+      expect(spy).toHaveBeenCalledTimes(3);
       expect(spy).toHaveBeenCalledWith('mouseenter', jasmine.any(Function), jasmine.any(Object));
+      expect(spy).toHaveBeenCalledWith('mouseover', jasmine.any(Function), jasmine.any(Object));
       expect(spy).toHaveBeenCalledWith('focusin', jasmine.any(Function), jasmine.any(Object));
     }));
 
@@ -3098,8 +3100,9 @@ describe('@defer', () => {
       fixture.componentInstance.renderBlock = false;
       fixture.detectChanges();
 
-      expect(spy).toHaveBeenCalledTimes(2);
+      expect(spy).toHaveBeenCalledTimes(3);
       expect(spy).toHaveBeenCalledWith('mouseenter', jasmine.any(Function), jasmine.any(Object));
+      expect(spy).toHaveBeenCalledWith('mouseover', jasmine.any(Function), jasmine.any(Object));
       expect(spy).toHaveBeenCalledWith('focusin', jasmine.any(Function), jasmine.any(Object));
     }));
 
@@ -4021,12 +4024,17 @@ describe('@defer', () => {
       fixture.detectChanges();
 
       // Verify that trigger element is cleaned up.
-      expect(triggerSpy).toHaveBeenCalledTimes(2);
+      expect(triggerSpy).toHaveBeenCalledTimes(3);
       expect(triggerSpy).toHaveBeenCalledWith(
         'mouseenter',
         jasmine.any(Function),
         jasmine.any(Object),
       );
+      expect(triggerSpy).toHaveBeenCalledWith(
+        'mouseover',
+        jasmine.any(Function),
+        jasmine.any(Object),
+      );
       expect(triggerSpy).toHaveBeenCalledWith(
         'focusin',
         jasmine.any(Function),
@@ -4034,12 +4042,17 @@ describe('@defer', () => {
       );
 
       // Verify that prefetch trigger element is cleaned up.
-      expect(prefetchSpy).toHaveBeenCalledTimes(2);
+      expect(prefetchSpy).toHaveBeenCalledTimes(3);
       expect(prefetchSpy).toHaveBeenCalledWith(
         'mouseenter',
         jasmine.any(Function),
         jasmine.any(Object),
       );
+      expect(prefetchSpy).toHaveBeenCalledWith(
+        'mouseover',
+        jasmine.any(Function),
+        jasmine.any(Object),
+      );
       expect(prefetchSpy).toHaveBeenCalledWith(
         'focusin',
         jasmine.any(Function),