diff --git a/core/modules/system/src/Tests/Entity/EntityQueryTest.php b/core/modules/system/src/Tests/Entity/EntityQueryTest.php
index 422bfa7..0872e78 100644
--- a/core/modules/system/src/Tests/Entity/EntityQueryTest.php
+++ b/core/modules/system/src/Tests/Entity/EntityQueryTest.php
@@ -443,6 +443,35 @@ public function testCount() {
      $this->assertFalse($count);
   }
 
+  /**
+   * Test queries with delta conditions.
+   */
+  public function testDelta() {
+    $greetings = $this->greetings;
+    $figures = $this->figures;
+    $this->queryResults = $this->factory->get('entity_test_mulrev')
+      ->condition("$figures.0.color", 'red')
+      ->sort('id')
+      ->execute();
+    // As unit 0 at delta 0 was the red triangle bit 0 needs to be set.
+    $this->assertResult(1, 3, 5, 7, 9, 11, 13, 15);
+
+    $this->queryResults = $this->factory->get('entity_test_mulrev')
+      ->condition("$figures.1.color", 'red')
+      ->sort('id')
+      ->execute();
+    // Delta 1 is not red.
+    $this->assertResult();
+
+    $this->queryResults = $this->factory->get('entity_test_mulrev')
+      ->condition("$figures.?.color", 'red')
+      ->condition("$figures.?", array(0, 1), 'IN')
+      ->sort('id')
+      ->execute();
+    // As unit 0 at delta 0 was the red triangle bit 0 needs to be set.
+    $this->assertResult(1, 3, 5, 7, 9, 11, 13, 15);
+  }
+
   protected function assertResult() {
     $assert = array();
     $expected = func_get_args();