diff --git a/src/Illuminate/Http/Request.php b/src/Illuminate/Http/Request.php
index 06f143c6020f..b0f59fe7d175 100644
--- a/src/Illuminate/Http/Request.php
+++ b/src/Illuminate/Http/Request.php
@@ -432,7 +432,9 @@ public static function createFromBase(SymfonyRequest $request)
 
         $newRequest->content = $request->content;
 
-        $newRequest->request = $newRequest->getInputSource();
+        if ($newRequest->isJson()) {
+            $newRequest->request = $newRequest->json();
+        }
 
         return $newRequest;
     }
diff --git a/tests/Http/HttpRequestTest.php b/tests/Http/HttpRequestTest.php
index c019499419f6..36435677b73c 100644
--- a/tests/Http/HttpRequestTest.php
+++ b/tests/Http/HttpRequestTest.php
@@ -993,7 +993,12 @@ public function testFingerprintWithoutRoute()
         $request->fingerprint();
     }
 
-    public function testCreateFromBase()
+    /**
+     * Ensure JSON GET requests populate $request->request with the JSON content.
+     *
+     * @link https://github.com/laravel/framework/pull/7052 Correctly fill the $request->request parameter bag on creation.
+     */
+    public function testJsonRequestFillsRequestBodyParams()
     {
         $body = [
             'foo' => 'bar',
@@ -1011,6 +1016,24 @@ public function testCreateFromBase()
         $this->assertEquals($request->request->all(), $body);
     }
 
+    /**
+     * Ensure non-JSON GET requests don't pollute $request->request with the GET parameters.
+     *
+     * @link https://github.com/laravel/framework/pull/37921 Manually populate POST request body with JSON data only when required.
+     */
+    public function testNonJsonRequestDoesntFillRequestBodyParams()
+    {
+        $params = ['foo' => 'bar'];
+
+        $getRequest = Request::create('/', 'GET', $params, [], [], []);
+        $this->assertEquals($getRequest->request->all(), []);
+        $this->assertEquals($getRequest->query->all(), $params);
+
+        $postRequest = Request::create('/', 'POST', $params, [], [], []);
+        $this->assertEquals($postRequest->request->all(), $params);
+        $this->assertEquals($postRequest->query->all(), []);
+    }
+
     /**
      * Tests for Http\Request magic methods `__get()` and `__isset()`.
      *