diff --git a/tests/http/stateless/ApplicationCoreTest.php b/tests/http/stateless/ApplicationCoreTest.php
index 280309f6..4ea0c5ad 100644
--- a/tests/http/stateless/ApplicationCoreTest.php
+++ b/tests/http/stateless/ApplicationCoreTest.php
@@ -115,6 +115,13 @@ static function () use (&$sequence): void {
             $response->getHeaderLine('Content-Type'),
             "Expected Content-Type 'application/json; charset=UTF-8' for route 'site/index'.",
         );
+        self::assertJsonStringEqualsJsonString(
+            <<<JSON
+            {"hello":"world"}
+            JSON,
+            $response->getBody()->getContents(),
+            "Expected JSON Response body '{\"hello\":\"world\"}'.",
+        );
         self::assertSame(
             ['before', 'after'],
             $sequence,
@@ -143,6 +150,13 @@ public function testResponseAdapterCachingAndResetBehaviorAcrossMultipleRequests
             $response1->getHeaderLine('Content-Type'),
             "Expected Content-Type 'application/json; charset=UTF-8' for route 'site/index'.",
         );
+        self::assertJsonStringEqualsJsonString(
+            <<<JSON
+            {"hello":"world"}
+            JSON,
+            $response1->getBody()->getContents(),
+            "Expected JSON Response body '{\"hello\":\"world\"}'.",
+        );
 
         // access the Response component to test adapter behavior
         $bridgeResponse1 = $app->response;
@@ -340,6 +354,13 @@ public function testSetsPsr7RequestWithStatelessAppStartTimeHeader(): void
             $response->getHeaderLine('Content-Type'),
             "Expected Content-Type 'application/json; charset=UTF-8' for route 'site/index'.",
         );
+        self::assertJsonStringEqualsJsonString(
+            <<<JSON
+            {"hello":"world"}
+            JSON,
+            $response->getBody()->getContents(),
+            "Expected JSON Response body '{\"hello\":\"world\"}'.",
+        );
 
         $psr7Request = $app->request->getPsr7Request();
         $statelessAppStartTime = $psr7Request->getHeaderLine('statelessAppStartTime');
@@ -374,6 +395,13 @@ public function testSetWebAndWebrootAliasesAfterHandleRequest(): void
             $response->getHeaderLine('Content-Type'),
             "Expected Content-Type 'application/json; charset=UTF-8' for route 'site/index'.",
         );
+        self::assertJsonStringEqualsJsonString(
+            <<<JSON
+            {"hello":"world"}
+            JSON,
+            $response->getBody()->getContents(),
+            "Expected JSON Response body '{\"hello\":\"world\"}'.",
+        );
         self::assertSame(
             '',
             Yii::getAlias('@web'),
@@ -420,6 +448,13 @@ static function (Event $event) use (&$invocations, &$sequence, &$sender): void {
             $response->getHeaderLine('Content-Type'),
             "Expected Content-Type 'application/json; charset=UTF-8' for route 'site/index'.",
         );
+        self::assertJsonStringEqualsJsonString(
+            <<<JSON
+            {"hello":"world"}
+            JSON,
+            $response->getBody()->getContents(),
+            "Expected JSON Response body '{\"hello\":\"world\"}'.",
+        );
         self::assertSame(
             1,
             $invocations,
diff --git a/tests/http/stateless/ApplicationTest.php b/tests/http/stateless/ApplicationTest.php
index b36a6d59..b1cde9ec 100644
--- a/tests/http/stateless/ApplicationTest.php
+++ b/tests/http/stateless/ApplicationTest.php
@@ -137,34 +137,6 @@ public function testReturnRedirectResponseForSiteRefreshRoute(): void
         );
     }
 
-    /**
-     * @throws InvalidConfigException if the configuration is invalid or incomplete.
-     */
-    public function testReturnsJsonResponse(): void
-    {
-        $app = $this->statelessApplication();
-
-        $response = $app->handle(FactoryHelper::createServerRequestCreator()->createFromGlobals());
-
-        self::assertSame(
-            200,
-            $response->getStatusCode(),
-            "Response 'status code' should be '200' for successful 'StatelessApplication' handling.",
-        );
-        self::assertSame(
-            'application/json; charset=UTF-8',
-            $response->getHeaderLine('Content-Type'),
-            "Response 'Content-Type' should be 'application/json; charset=UTF-8' for JSON output.",
-        );
-        self::assertSame(
-            <<<JSON
-            {"hello":"world"}
-            JSON,
-            $response->getBody()->getContents(),
-            "Response 'body' should match expected JSON string '{\"hello\":\"world\"}'.",
-        );
-    }
-
     /**
      * @throws InvalidConfigException if the configuration is invalid or incomplete.
      */