diff --git a/tests/cases/compiler/blockScopedBindingCaptureThisInFunction.ts b/tests/cases/compiler/blockScopedBindingCaptureThisInFunction.ts
index 7c054a0e0eacb..100c42238a5e8 100644
--- a/tests/cases/compiler/blockScopedBindingCaptureThisInFunction.ts
+++ b/tests/cases/compiler/blockScopedBindingCaptureThisInFunction.ts
@@ -1,3 +1,4 @@
+// @strict: false
 // https://github.com/Microsoft/TypeScript/issues/11038
 () => function () {
     for (let someKey in {}) {
diff --git a/tests/cases/compiler/collisionThisExpressionAndAliasInGlobal.ts b/tests/cases/compiler/collisionThisExpressionAndAliasInGlobal.ts
index 6c4d9c768a7be..d81d96994a0b4 100644
--- a/tests/cases/compiler/collisionThisExpressionAndAliasInGlobal.ts
+++ b/tests/cases/compiler/collisionThisExpressionAndAliasInGlobal.ts
@@ -1,3 +1,4 @@
+// @strict: false
 namespace a {
     export var b = 10;
 }
diff --git a/tests/cases/compiler/collisionThisExpressionAndAmbientClassInGlobal.ts b/tests/cases/compiler/collisionThisExpressionAndAmbientClassInGlobal.ts
index d4e9b2f06b9d8..bc169f0252db7 100644
--- a/tests/cases/compiler/collisionThisExpressionAndAmbientClassInGlobal.ts
+++ b/tests/cases/compiler/collisionThisExpressionAndAmbientClassInGlobal.ts
@@ -1,3 +1,4 @@
+// @strict: false
 declare class _this { // no error - as no code generation
 }
 var f = () => this;
diff --git a/tests/cases/compiler/collisionThisExpressionAndAmbientVarInGlobal.ts b/tests/cases/compiler/collisionThisExpressionAndAmbientVarInGlobal.ts
index c2f228d26d802..cb5edca93a73a 100644
--- a/tests/cases/compiler/collisionThisExpressionAndAmbientVarInGlobal.ts
+++ b/tests/cases/compiler/collisionThisExpressionAndAmbientVarInGlobal.ts
@@ -1,3 +1,4 @@
+// @strict: false
 declare var _this: number; // no error as no code gen
 var f = () => this;
 _this = 10; // Error
\ No newline at end of file
diff --git a/tests/cases/compiler/collisionThisExpressionAndClassInGlobal.ts b/tests/cases/compiler/collisionThisExpressionAndClassInGlobal.ts
index 236f038614500..cafb4ee7d940b 100644
--- a/tests/cases/compiler/collisionThisExpressionAndClassInGlobal.ts
+++ b/tests/cases/compiler/collisionThisExpressionAndClassInGlobal.ts
@@ -1,3 +1,4 @@
+// @strict: false
 class _this {
 }
 var f = () => this;
\ No newline at end of file
diff --git a/tests/cases/compiler/collisionThisExpressionAndEnumInGlobal.ts b/tests/cases/compiler/collisionThisExpressionAndEnumInGlobal.ts
index 49d9aaa3ce47c..49d09fbfeedc6 100644
--- a/tests/cases/compiler/collisionThisExpressionAndEnumInGlobal.ts
+++ b/tests/cases/compiler/collisionThisExpressionAndEnumInGlobal.ts
@@ -1,3 +1,4 @@
+// @strict: false
 enum _this { // Error
     _thisVal1,
     _thisVal2,
diff --git a/tests/cases/compiler/collisionThisExpressionAndFunctionInGlobal.ts b/tests/cases/compiler/collisionThisExpressionAndFunctionInGlobal.ts
index 50cbb6c1157fa..a25011166cf4c 100644
--- a/tests/cases/compiler/collisionThisExpressionAndFunctionInGlobal.ts
+++ b/tests/cases/compiler/collisionThisExpressionAndFunctionInGlobal.ts
@@ -1,3 +1,4 @@
+// @strict: false
 function _this() { //Error
     return 10;
 }
diff --git a/tests/cases/compiler/collisionThisExpressionAndModuleInGlobal.ts b/tests/cases/compiler/collisionThisExpressionAndModuleInGlobal.ts
index d830f14a811a2..6c0b2af14d900 100644
--- a/tests/cases/compiler/collisionThisExpressionAndModuleInGlobal.ts
+++ b/tests/cases/compiler/collisionThisExpressionAndModuleInGlobal.ts
@@ -1,3 +1,4 @@
+// @strict: false
 namespace _this { //Error
     class c {
     }
diff --git a/tests/cases/compiler/collisionThisExpressionAndVarInGlobal.ts b/tests/cases/compiler/collisionThisExpressionAndVarInGlobal.ts
index 26ea678e80768..09faa94a82b5e 100644
--- a/tests/cases/compiler/collisionThisExpressionAndVarInGlobal.ts
+++ b/tests/cases/compiler/collisionThisExpressionAndVarInGlobal.ts
@@ -1,2 +1,3 @@
+// @strict: false
 var _this = 1;
 var f = () => this;
\ No newline at end of file
diff --git a/tests/cases/compiler/declarationEmitPromise.ts b/tests/cases/compiler/declarationEmitPromise.ts
index 2eff0b6c50c9e..93882abab3763 100644
--- a/tests/cases/compiler/declarationEmitPromise.ts
+++ b/tests/cases/compiler/declarationEmitPromise.ts
@@ -1,4 +1,5 @@
 // @declaration: true
+// @noImplicitThis: false
 // @module: commonjs
 // @target: es6
 
diff --git a/tests/cases/compiler/lambdaPropSelf.ts b/tests/cases/compiler/lambdaPropSelf.ts
index 2b80447755a11..2a91aa3874b53 100644
--- a/tests/cases/compiler/lambdaPropSelf.ts
+++ b/tests/cases/compiler/lambdaPropSelf.ts
@@ -1,3 +1,4 @@
+// @strict: false
 declare var ko: any;
 
 class Person {
diff --git a/tests/cases/compiler/noParameterReassignmentJSIIFE.ts b/tests/cases/compiler/noParameterReassignmentJSIIFE.ts
index 175e87887ecfd..3b59125987f08 100644
--- a/tests/cases/compiler/noParameterReassignmentJSIIFE.ts
+++ b/tests/cases/compiler/noParameterReassignmentJSIIFE.ts
@@ -1,6 +1,7 @@
 // @allowJs: true
 // @checkJs: true
 // @noEmit: true
+// @noImplicitThis: false
 // @filename: index.js
 self.importScripts = (function (importScripts) {
     return function () {
diff --git a/tests/cases/conformance/interfaces/interfaceDeclarations/interfaceExtendsObjectIntersectionErrors.ts b/tests/cases/conformance/interfaces/interfaceDeclarations/interfaceExtendsObjectIntersectionErrors.ts
index 5a2a37fc22754..70891a7b1038b 100644
--- a/tests/cases/conformance/interfaces/interfaceDeclarations/interfaceExtendsObjectIntersectionErrors.ts
+++ b/tests/cases/conformance/interfaces/interfaceDeclarations/interfaceExtendsObjectIntersectionErrors.ts
@@ -1,4 +1,5 @@
 // @strictNullChecks: true
+// @strictPropertyInitialization: false
 
 type T1 = { a: number };
 type T2 = T1 & { b: number };
diff --git a/tests/cases/conformance/parser/ecmascript5/ErrorRecovery/parserModifierOnStatementInBlock1.ts b/tests/cases/conformance/parser/ecmascript5/ErrorRecovery/parserModifierOnStatementInBlock1.ts
index c4c56acf5787c..aea4db3053750 100644
--- a/tests/cases/conformance/parser/ecmascript5/ErrorRecovery/parserModifierOnStatementInBlock1.ts
+++ b/tests/cases/conformance/parser/ecmascript5/ErrorRecovery/parserModifierOnStatementInBlock1.ts
@@ -1,3 +1,4 @@
+// @strict: false
 export function foo() {
    export var x = this;
 }
diff --git a/tests/cases/fourslash/fixExactOptionalUnassignableProperties11.ts b/tests/cases/fourslash/fixExactOptionalUnassignableProperties11.ts
index 094c0288ecead..489f7f93b3ae5 100644
--- a/tests/cases/fourslash/fixExactOptionalUnassignableProperties11.ts
+++ b/tests/cases/fourslash/fixExactOptionalUnassignableProperties11.ts
@@ -11,7 +11,7 @@
 //// declare var j: J
 //// class C {
 ////     ic: IC
-////     m() { this.ic/**/ = j }
+////     constructor() { this.ic/**/ = j }
 //// }
 verify.codeFixAvailable([
     { description: ts.Diagnostics.Add_undefined_to_optional_property_type.message }
@@ -30,7 +30,7 @@ interface J {
 declare var j: J
 class C {
     ic: IC
-    m() { this.ic = j }
+    constructor() { this.ic = j }
 }`,
 });
 
diff --git a/tests/cases/fourslash/fixExactOptionalUnassignableProperties12.ts b/tests/cases/fourslash/fixExactOptionalUnassignableProperties12.ts
index 0e81cc8e67e11..3722a53327212 100644
--- a/tests/cases/fourslash/fixExactOptionalUnassignableProperties12.ts
+++ b/tests/cases/fourslash/fixExactOptionalUnassignableProperties12.ts
@@ -9,10 +9,10 @@
 ////     a?: number | undefined
 //// }
 //// declare var j: J
-//// class C {
+//// interface C {
 ////     ic2: IC2
 //// }
-//// var c = new C()
+//// declare var c: C
 //// c.ic2/**/ = j
 verify.codeFixAvailable([
     { description: ts.Diagnostics.Add_undefined_to_optional_property_type.message }
@@ -29,10 +29,10 @@ interface J {
     a?: number | undefined
 }
 declare var j: J
-class C {
+interface C {
     ic2: IC2
 }
-var c = new C()
+declare var c: C
 c.ic2 = j`,
 });