diff --git a/tests/baselines/reference/quotedConstructors.errors.txt b/tests/baselines/reference/quotedConstructors.errors.txt
new file mode 100644
index 0000000000000..609bff8fdfc7a
--- /dev/null
+++ b/tests/baselines/reference/quotedConstructors.errors.txt
@@ -0,0 +1,30 @@
+tests/cases/conformance/classes/constructorDeclarations/quotedConstructors.ts(2,5): error TS96000: Quoted constructors have previously been interpreted as methods, which is incorrect. In TypeScript 3.6, they will be correctly parsed as constructors. In the meantime, consider using 'constructor()' to write a constructor, or '["constructor"]()' to write a method.
+tests/cases/conformance/classes/constructorDeclarations/quotedConstructors.ts(6,5): error TS96000: Quoted constructors have previously been interpreted as methods, which is incorrect. In TypeScript 3.6, they will be correctly parsed as constructors. In the meantime, consider using 'constructor()' to write a constructor, or '["constructor"]()' to write a method.
+tests/cases/conformance/classes/constructorDeclarations/quotedConstructors.ts(14,5): error TS96000: Quoted constructors have previously been interpreted as methods, which is incorrect. In TypeScript 3.6, they will be correctly parsed as constructors. In the meantime, consider using 'constructor()' to write a constructor, or '["constructor"]()' to write a method.
+
+
+==== tests/cases/conformance/classes/constructorDeclarations/quotedConstructors.ts (3 errors) ====
+    class C {
+        "constructor"() {} // Error in 3.5
+        ~~~~~~~~~~~~~
+!!! error TS96000: Quoted constructors have previously been interpreted as methods, which is incorrect. In TypeScript 3.6, they will be correctly parsed as constructors. In the meantime, consider using 'constructor()' to write a constructor, or '["constructor"]()' to write a method.
+    }
+    
+    class D {
+        'constructor'() {} // Error in 3.5
+        ~~~~~~~~~~~~~
+!!! error TS96000: Quoted constructors have previously been interpreted as methods, which is incorrect. In TypeScript 3.6, they will be correctly parsed as constructors. In the meantime, consider using 'constructor()' to write a constructor, or '["constructor"]()' to write a method.
+    }
+    
+    class E {
+        ['constructor']() {}
+    }
+    
+    new class {
+        "constructor"() {} // Error in 3.5
+        ~~~~~~~~~~~~~
+!!! error TS96000: Quoted constructors have previously been interpreted as methods, which is incorrect. In TypeScript 3.6, they will be correctly parsed as constructors. In the meantime, consider using 'constructor()' to write a constructor, or '["constructor"]()' to write a method.
+    };
+    
+    var o = { "constructor"() {} };
+    
\ No newline at end of file
diff --git a/tests/baselines/reference/quotedConstructors.js b/tests/baselines/reference/quotedConstructors.js
new file mode 100644
index 0000000000000..c9a662e6af526
--- /dev/null
+++ b/tests/baselines/reference/quotedConstructors.js
@@ -0,0 +1,46 @@
+//// [quotedConstructors.ts]
+class C {
+    "constructor"() {} // Error in 3.5
+}
+
+class D {
+    'constructor'() {} // Error in 3.5
+}
+
+class E {
+    ['constructor']() {}
+}
+
+new class {
+    "constructor"() {} // Error in 3.5
+};
+
+var o = { "constructor"() {} };
+
+
+//// [quotedConstructors.js]
+var C = /** @class */ (function () {
+    function C() {
+    }
+    C.prototype["constructor"] = function () { }; // Error in 3.5
+    return C;
+}());
+var D = /** @class */ (function () {
+    function D() {
+    }
+    D.prototype['constructor'] = function () { }; // Error in 3.5
+    return D;
+}());
+var E = /** @class */ (function () {
+    function E() {
+    }
+    E.prototype['constructor'] = function () { };
+    return E;
+}());
+new /** @class */ (function () {
+    function class_1() {
+    }
+    class_1.prototype["constructor"] = function () { }; // Error in 3.5
+    return class_1;
+}());
+var o = { "constructor": function () { } };
diff --git a/tests/baselines/reference/quotedConstructors.symbols b/tests/baselines/reference/quotedConstructors.symbols
new file mode 100644
index 0000000000000..be68e48484754
--- /dev/null
+++ b/tests/baselines/reference/quotedConstructors.symbols
@@ -0,0 +1,33 @@
+=== tests/cases/conformance/classes/constructorDeclarations/quotedConstructors.ts ===
+class C {
+>C : Symbol(C, Decl(quotedConstructors.ts, 0, 0))
+
+    "constructor"() {} // Error in 3.5
+>"constructor" : Symbol(C["constructor"], Decl(quotedConstructors.ts, 0, 9))
+}
+
+class D {
+>D : Symbol(D, Decl(quotedConstructors.ts, 2, 1))
+
+    'constructor'() {} // Error in 3.5
+>'constructor' : Symbol(D['constructor'], Decl(quotedConstructors.ts, 4, 9))
+}
+
+class E {
+>E : Symbol(E, Decl(quotedConstructors.ts, 6, 1))
+
+    ['constructor']() {}
+>['constructor'] : Symbol(E['constructor'], Decl(quotedConstructors.ts, 8, 9))
+>'constructor' : Symbol(E['constructor'], Decl(quotedConstructors.ts, 8, 9))
+}
+
+new class {
+    "constructor"() {} // Error in 3.5
+>"constructor" : Symbol((Anonymous class)["constructor"], Decl(quotedConstructors.ts, 12, 11))
+
+};
+
+var o = { "constructor"() {} };
+>o : Symbol(o, Decl(quotedConstructors.ts, 16, 3))
+>"constructor" : Symbol("constructor", Decl(quotedConstructors.ts, 16, 9))
+
diff --git a/tests/baselines/reference/quotedConstructors.types b/tests/baselines/reference/quotedConstructors.types
new file mode 100644
index 0000000000000..907a2152a80ac
--- /dev/null
+++ b/tests/baselines/reference/quotedConstructors.types
@@ -0,0 +1,37 @@
+=== tests/cases/conformance/classes/constructorDeclarations/quotedConstructors.ts ===
+class C {
+>C : C
+
+    "constructor"() {} // Error in 3.5
+>"constructor" : () => void
+}
+
+class D {
+>D : D
+
+    'constructor'() {} // Error in 3.5
+>'constructor' : () => void
+}
+
+class E {
+>E : E
+
+    ['constructor']() {}
+>['constructor'] : () => void
+>'constructor' : "constructor"
+}
+
+new class {
+>new class {    "constructor"() {} // Error in 3.5} : (Anonymous class)
+>class {    "constructor"() {} // Error in 3.5} : typeof (Anonymous class)
+
+    "constructor"() {} // Error in 3.5
+>"constructor" : () => void
+
+};
+
+var o = { "constructor"() {} };
+>o : { "constructor"(): void; }
+>{ "constructor"() {} } : { "constructor"(): void; }
+>"constructor" : () => void
+