1 files changed, 10 insertions, 4 deletions
diff --git a/src/mongo/db/pipeline/expression_test.cpp b/src/mongo/db/pipeline/expression_test.cpp
index 743f46ee6cd..8ff42966922 100644
--- a/src/mongo/db/pipeline/expression_test.cpp
+++ b/src/mongo/db/pipeline/expression_test.cpp
@@ -1602,11 +1602,10 @@ boost::intrusive_ptr<Expression> parseObject(BSONObj specification) {
 TEST(ParseObject, ShouldAcceptEmptyObject) {
     auto resultExpression = parseObject(BSONObj());
 
-    // Should return an empty ExpressionObject.
-    auto resultObject = dynamic_cast<ExpressionObject*>(resultExpression.get());
+    // Should return an empty object.
+    auto resultObject = dynamic_cast<ExpressionConstant*>(resultExpression.get());
     ASSERT_TRUE(resultObject);
-
-    ASSERT_EQ(resultObject->getChildExpressions().size(), 0UL);
+    ASSERT_VALUE_EQ(resultObject->getValue(), Value(Document{}));
 }
 
 TEST(ParseObject, ShouldRecognizeKnownExpression) {
@@ -5126,6 +5125,13 @@ TEST(ExpressionParseParenthesisExpressionObjTest, SingleExprSimplification) {
     ASSERT_EQ(expr->serialize().toString(), "[{$const: 123}]");
 }
 
+TEST(ExpressionParseParenthesisExpressionObjTest, EmptyObject) {
+    auto expCtx = ExpressionContextForTest{};
+    auto specObject = fromjson("{$expr: {}}");
+    auto expr = Expression::parseObject(&expCtx, specObject, expCtx.variablesParseState);
+    ASSERT_EQ(expr->serialize().toString(), "{$const: {}}");
+}
+
 /**
  * Test case for round-trip conversion of random double using $convert.
  *