diff --git a/tests/baselines/reference/checkJsdocTypeTag3.errors.txt b/tests/baselines/reference/checkJsdocTypeTag3.errors.txt
deleted file mode 100644
index d53c0972fa3..00000000000
--- a/tests/baselines/reference/checkJsdocTypeTag3.errors.txt
+++ /dev/null
@@ -1,21 +0,0 @@
-tests/cases/conformance/jsdoc/0.js(5,4): error TS2345: Argument of type '"string"' is not assignable to parameter of type 'number'.
-tests/cases/conformance/jsdoc/0.js(12,1): error TS2322: Type 'number' is not assignable to type 'string'.
-
-
-==== tests/cases/conformance/jsdoc/0.js (2 errors) ====
-    // @ts-check
-    
-    /** @type {function (number)} */
-    const x1 = (a) => a + 1;
-    x1("string");
-       ~~~~~~~~
-!!! error TS2345: Argument of type '"string"' is not assignable to parameter of type 'number'.
-    
-    /** @type {function (number): number} */
-    const x2 = (a) => a + 1;
-    
-    /** @type {string} */
-    var a;
-    a = x2(0);
-    ~
-!!! error TS2322: Type 'number' is not assignable to type 'string'.
\ No newline at end of file
diff --git a/tests/baselines/reference/checkJsdocTypeTag3.js b/tests/baselines/reference/checkJsdocTypeTag3.js
deleted file mode 100644
index 2eb50223ba2..00000000000
--- a/tests/baselines/reference/checkJsdocTypeTag3.js
+++ /dev/null
@@ -1,24 +0,0 @@
-//// [0.js]
-// @ts-check
-
-/** @type {function (number)} */
-const x1 = (a) => a + 1;
-x1("string");
-
-/** @type {function (number): number} */
-const x2 = (a) => a + 1;
-
-/** @type {string} */
-var a;
-a = x2(0);
-
-//// [0.js]
-// @ts-check
-/** @type {function (number)} */
-var x1 = function (a) { return a + 1; };
-x1("string");
-/** @type {function (number): number} */
-var x2 = function (a) { return a + 1; };
-/** @type {string} */
-var a;
-a = x2(0);
diff --git a/tests/baselines/reference/checkJsdocTypeTag3.symbols b/tests/baselines/reference/checkJsdocTypeTag3.symbols
new file mode 100644
index 00000000000..4e731fbdc87
--- /dev/null
+++ b/tests/baselines/reference/checkJsdocTypeTag3.symbols
@@ -0,0 +1,5 @@
+=== tests/cases/conformance/jsdoc/test.js ===
+/** @type {Array<?number>} */
+var nns;
+>nns : Symbol(nns, Decl(test.js, 1, 3))
+
diff --git a/tests/baselines/reference/checkJsdocTypeTag3.types b/tests/baselines/reference/checkJsdocTypeTag3.types
new file mode 100644
index 00000000000..94d953e0b44
--- /dev/null
+++ b/tests/baselines/reference/checkJsdocTypeTag3.types
@@ -0,0 +1,5 @@
+=== tests/cases/conformance/jsdoc/test.js ===
+/** @type {Array<?number>} */
+var nns;
+>nns : number[]
+
diff --git a/tests/baselines/reference/thisTypeInFunctionsNegative.errors.txt b/tests/baselines/reference/thisTypeInFunctionsNegative.errors.txt
index 4f566c1a7ae..b813c08705b 100644
--- a/tests/baselines/reference/thisTypeInFunctionsNegative.errors.txt
+++ b/tests/baselines/reference/thisTypeInFunctionsNegative.errors.txt
@@ -84,7 +84,6 @@ tests/cases/conformance/types/thisType/thisTypeInFunctionsNegative.ts(169,20): e
 tests/cases/conformance/types/thisType/thisTypeInFunctionsNegative.ts(169,23): error TS1003: Identifier expected.
 tests/cases/conformance/types/thisType/thisTypeInFunctionsNegative.ts(169,27): error TS1005: ',' expected.
 tests/cases/conformance/types/thisType/thisTypeInFunctionsNegative.ts(170,23): error TS1005: ',' expected.
-tests/cases/conformance/types/thisType/thisTypeInFunctionsNegative.ts(170,24): error TS1138: Parameter declaration expected.
 tests/cases/conformance/types/thisType/thisTypeInFunctionsNegative.ts(171,28): error TS1003: Identifier expected.
 tests/cases/conformance/types/thisType/thisTypeInFunctionsNegative.ts(171,32): error TS1005: ',' expected.
 tests/cases/conformance/types/thisType/thisTypeInFunctionsNegative.ts(172,30): error TS1005: ',' expected.
@@ -94,7 +93,7 @@ tests/cases/conformance/types/thisType/thisTypeInFunctionsNegative.ts(175,32): e
 tests/cases/conformance/types/thisType/thisTypeInFunctionsNegative.ts(175,35): error TS2304: Cannot find name 'm'.
 
 
-==== tests/cases/conformance/types/thisType/thisTypeInFunctionsNegative.ts (60 errors) ====
+==== tests/cases/conformance/types/thisType/thisTypeInFunctionsNegative.ts (59 errors) ====
     class C {
         n: number;
         explicitThis(this: this, m: number): number {
@@ -403,8 +402,6 @@ tests/cases/conformance/types/thisType/thisTypeInFunctionsNegative.ts(175,35): e
     function optional(this?: C): number { return this.n; }
                           ~
 !!! error TS1005: ',' expected.
-                           ~
-!!! error TS1138: Parameter declaration expected.
     function decorated(@deco() this: C): number { return this.n; }
                                ~~~~
 !!! error TS1003: Identifier expected.
diff --git a/tests/baselines/reference/thisTypeInFunctionsNegative.js b/tests/baselines/reference/thisTypeInFunctionsNegative.js
index c0a6ecb1dee..94a0565e237 100644
--- a/tests/baselines/reference/thisTypeInFunctionsNegative.js
+++ b/tests/baselines/reference/thisTypeInFunctionsNegative.js
@@ -345,7 +345,7 @@ function modifiers(, C) {
     return this.n;
 }
 function restParam(C) { return this.n; }
-function optional(C) { return this.n; }
+function optional() { return this.n; }
 function decorated(, C) {
     if ( === void 0) {  = this; }
     return this.n;
diff --git a/tests/cases/conformance/jsdoc/checkJsdocTypeTag3.ts b/tests/cases/conformance/jsdoc/checkJsdocTypeTag3.ts
new file mode 100644
index 00000000000..0051e1029f9
--- /dev/null
+++ b/tests/cases/conformance/jsdoc/checkJsdocTypeTag3.ts
@@ -0,0 +1,6 @@
+// @Filename:test.js
+// @checkJs: true
+// @allowJs: true
+// @noEmit: true
+/** @type {Array<?number>} */
+var nns;