diff --git a/tests/baselines/reference/objectTypesWithOptionalProperties.errors.txt b/tests/baselines/reference/objectTypesWithOptionalProperties.errors.txt
index 9fb2adc8c2..74057195c6 100644
--- a/tests/baselines/reference/objectTypesWithOptionalProperties.errors.txt
+++ b/tests/baselines/reference/objectTypesWithOptionalProperties.errors.txt
@@ -13,7 +13,7 @@ tests/cases/conformance/types/objectTypeLiteral/methodSignatures/objectTypesWith
     }
     
     class C {
-        x?: number; // error
+        x?: number; // ok
     }
     
     interface I2<T> {
@@ -21,7 +21,7 @@ tests/cases/conformance/types/objectTypeLiteral/methodSignatures/objectTypesWith
     }
     
     class C2<T> {
-        x?: T; // error
+        x?: T; // ok
     }
     
     var b = {
diff --git a/tests/baselines/reference/objectTypesWithOptionalProperties.js b/tests/baselines/reference/objectTypesWithOptionalProperties.js
index 98141c048d..9b2ada010d 100644
--- a/tests/baselines/reference/objectTypesWithOptionalProperties.js
+++ b/tests/baselines/reference/objectTypesWithOptionalProperties.js
@@ -10,7 +10,7 @@ interface I {
 }
 
 class C {
-    x?: number; // error
+    x?: number; // ok
 }
 
 interface I2<T> {
@@ -18,7 +18,7 @@ interface I2<T> {
 }
 
 class C2<T> {
-    x?: T; // error
+    x?: T; // ok
 }
 
 var b = {
diff --git a/tests/cases/conformance/types/objectTypeLiteral/methodSignatures/objectTypesWithOptionalProperties.ts b/tests/cases/conformance/types/objectTypeLiteral/methodSignatures/objectTypesWithOptionalProperties.ts
index f80c3a5952..7c05ff09e5 100644
--- a/tests/cases/conformance/types/objectTypeLiteral/methodSignatures/objectTypesWithOptionalProperties.ts
+++ b/tests/cases/conformance/types/objectTypeLiteral/methodSignatures/objectTypesWithOptionalProperties.ts
@@ -9,7 +9,7 @@ interface I {
 }
 
 class C {
-    x?: number; // error
+    x?: number; // ok
 }
 
 interface I2<T> {
@@ -17,7 +17,7 @@ interface I2<T> {
 }
 
 class C2<T> {
-    x?: T; // error
+    x?: T; // ok
 }
 
 var b = {