diff --git a/tests/Support/SupportHelpersTest.php b/tests/Support/SupportHelpersTest.php
index ee4c09a73101..38ed83afdf96 100644
--- a/tests/Support/SupportHelpersTest.php
+++ b/tests/Support/SupportHelpersTest.php
@@ -411,6 +411,18 @@ public function testDataGetEscapedSegmentKeys()
         $this->assertEquals('caret', data_get($array, 'symbols.{last}.description'));
     }
 
+    public function testDataGetNullKey()
+    {
+        $data = ['foo' => 'bar'];
+
+        $this->assertEquals([ 'foo' => 'bar' ], data_get($data, null));
+        $this->assertEquals([ 'foo' => 'bar' ], data_get($data, null, '42'));
+        $this->assertEquals([ 'foo' => 'bar' ], data_get($data, [null]));
+
+        $data = ['foo' => 'bar', 'baz' => 42];
+        $this->assertEquals([ 'foo' => 'bar', 'baz' => 42 ], data_get($data, [null, 'foo']));
+    }
+
     public function testDataFill()
     {
         $data = ['foo' => 'bar'];