diff --git a/tests/cases/compiler/typeOfEnumAndVarRedeclarations.ts b/tests/cases/compiler/typeOfEnumAndVarRedeclarations.ts
index 996560385d8..2033ef743a4 100644
--- a/tests/cases/compiler/typeOfEnumAndVarRedeclarations.ts
+++ b/tests/cases/compiler/typeOfEnumAndVarRedeclarations.ts
@@ -5,6 +5,6 @@ enum E {
     b = 1
 }
 var x = E;
-var x: { a: E; b: E;[x: number]: string; }; // Shouldnt error
+var x: { readonly a: E; readonly b: E; readonly [x: number]: string; }; // Shouldnt error
 var y = E;
-var y: { a: E; b: E;[x: number]: string;[x: number]: string } // two errors: the types are not identical and duplicate signatures
\ No newline at end of file
+var y: { readonly a: E; readonly b: E; readonly [x: number]: string; readonly [x: number]: string } // two errors: the types are not identical and duplicate signatures
\ No newline at end of file
diff --git a/tests/cases/conformance/enums/enumBasics.ts b/tests/cases/conformance/enums/enumBasics.ts
index 756e08e97af..1e134540713 100644
--- a/tests/cases/conformance/enums/enumBasics.ts
+++ b/tests/cases/conformance/enums/enumBasics.ts
@@ -11,10 +11,10 @@ var x: number = E1.A;
 // Enum object type is anonymous with properties of the enum type and numeric indexer
 var e = E1;
 var e: {
-    A: E1;
-    B: E1;
-    C: E1;
-    [n: number]: string;
+    readonly A: E1;
+    readonly B: E1;
+    readonly C: E1;
+    readonly [n: number]: string;
 };
 var e: typeof E1;
 
diff --git a/tests/cases/conformance/expressions/objectLiterals/objectLiteralGettersAndSetters.ts b/tests/cases/conformance/expressions/objectLiterals/objectLiteralGettersAndSetters.ts
index 5a6bc87af36..af0622179ac 100644
--- a/tests/cases/conformance/expressions/objectLiterals/objectLiteralGettersAndSetters.ts
+++ b/tests/cases/conformance/expressions/objectLiterals/objectLiteralGettersAndSetters.ts
@@ -16,11 +16,11 @@ var callSig3: { num: (n: number) => string; };
 
 // Get accessor only, type of the property is the annotated return type of the get accessor
 var getter1 = { get x(): string { return undefined; } };
-var getter1: { x: string; }
+var getter1: { readonly x: string; }
 
 // Get accessor only, type of the property is the inferred return type of the get accessor
 var getter2 = { get x() { return ''; } };
-var getter2: { x: string; }
+var getter2: { readonly x: string; }
 
 // Set accessor only, type of the property is the param type of the set accessor
 var setter1 = { set x(n: number) { } };
diff --git a/tests/cases/fourslash/quickInfoOnObjectLiteralWithOnlyGetter.ts b/tests/cases/fourslash/quickInfoOnObjectLiteralWithOnlyGetter.ts
index 53f5e6988b7..a2e783d9ce0 100644
--- a/tests/cases/fourslash/quickInfoOnObjectLiteralWithOnlyGetter.ts
+++ b/tests/cases/fourslash/quickInfoOnObjectLiteralWithOnlyGetter.ts
@@ -9,7 +9,7 @@
 ////var /*2*/x = point./*3*/x;
 
 goTo.marker('1');
-verify.quickInfoIs("function makePoint(x: number): {\n    x: number;\n}", undefined);
+verify.quickInfoIs("function makePoint(x: number): {\n    readonly x: number;\n}", undefined);
 
 goTo.marker('2');
 verify.quickInfoIs("var x: number", undefined);
@@ -18,4 +18,4 @@ goTo.marker('3');
 verify.memberListContains("x", "(property) x: number", undefined);
 
 goTo.marker('4');
-verify.quickInfoIs("var point: {\n    x: number;\n}", undefined);
+verify.quickInfoIs("var point: {\n    readonly x: number;\n}", undefined);