diff --git a/shell/platform/darwin/macos/framework/Source/FlutterEngineTest.mm b/shell/platform/darwin/macos/framework/Source/FlutterEngineTest.mm
index 4aa073de93506..90177509f0eb9 100644
--- a/shell/platform/darwin/macos/framework/Source/FlutterEngineTest.mm
+++ b/shell/platform/darwin/macos/framework/Source/FlutterEngineTest.mm
@@ -122,7 +122,7 @@ + (void)registerWithRegistrar:(id<FlutterPluginRegistrar>)registrar {
 TEST_F(FlutterEngineTest, CanLaunch) {
   FlutterEngine* engine = GetFlutterEngine();
   EXPECT_TRUE([engine runWithEntrypoint:@"main"]);
-  EXPECT_TRUE(engine.running);
+  ASSERT_TRUE(engine.running);
 }
 
 TEST_F(FlutterEngineTest, HasNonNullExecutableName) {
@@ -196,7 +196,7 @@ + (void)registerWithRegistrar:(id<FlutterPluginRegistrar>)registrar {
   // Launch the test entrypoint.
   FlutterEngine* engine = GetFlutterEngine();
   EXPECT_TRUE([engine runWithEntrypoint:@"canLogToStdout"]);
-  EXPECT_TRUE(engine.running);
+  ASSERT_TRUE(engine.running);
 
   latch.Wait();
 
@@ -227,7 +227,7 @@ + (void)registerWithRegistrar:(id<FlutterPluginRegistrar>)registrar {
 
   // Launch the test entrypoint.
   EXPECT_TRUE([engine runWithEntrypoint:@"backgroundTest"]);
-  EXPECT_TRUE(engine.running);
+  ASSERT_TRUE(engine.running);
 
   FlutterViewController* viewController = [[FlutterViewController alloc] initWithEngine:engine
                                                                                 nibName:nil
@@ -257,7 +257,7 @@ + (void)registerWithRegistrar:(id<FlutterPluginRegistrar>)registrar {
 
   // Launch the test entrypoint.
   EXPECT_TRUE([engine runWithEntrypoint:@"backgroundTest"]);
-  EXPECT_TRUE(engine.running);
+  ASSERT_TRUE(engine.running);
 
   FlutterViewController* viewController = [[FlutterViewController alloc] initWithEngine:engine
                                                                                 nibName:nil
@@ -479,7 +479,7 @@ + (void)registerWithRegistrar:(id<FlutterPluginRegistrar>)registrar {
 
   FlutterEngine* engine = GetFlutterEngine();
   EXPECT_TRUE([engine runWithEntrypoint:@"nativeCallback"]);
-  EXPECT_TRUE(engine.running);
+  ASSERT_TRUE(engine.running);
 
   latch.Wait();
   ASSERT_TRUE(latch_called);