diff --git a/tests/baselines/reference/checkJsxChildrenProperty2.errors.txt b/tests/baselines/reference/checkJsxChildrenProperty2.errors.txt
index 0edadf6dc1b..e2931b3fb5d 100644
--- a/tests/baselines/reference/checkJsxChildrenProperty2.errors.txt
+++ b/tests/baselines/reference/checkJsxChildrenProperty2.errors.txt
@@ -3,19 +3,19 @@ tests/cases/conformance/jsx/file.tsx(17,11): error TS2710: 'children' are specif
 tests/cases/conformance/jsx/file.tsx(31,6): error TS2322: Type '{ children: (Element | ((name: string) => Element))[]; a: number; b: string; }' is not assignable to type 'Prop'.
   Types of property 'children' are incompatible.
     Type '(Element | ((name: string) => Element))[]' is not assignable to type 'string | Element'.
-      Type '(Element | ((name: string) => Element))[]' is missing the following properties from type 'Element': type, props
+      Type '(Element | ((name: string) => Element))[]' is not assignable to type 'string'.
 tests/cases/conformance/jsx/file.tsx(37,6): error TS2322: Type '{ children: (number | Element)[]; a: number; b: string; }' is not assignable to type 'Prop'.
   Types of property 'children' are incompatible.
     Type '(number | Element)[]' is not assignable to type 'string | Element'.
-      Type '(number | Element)[]' is missing the following properties from type 'Element': type, props
+      Type '(number | Element)[]' is not assignable to type 'string'.
 tests/cases/conformance/jsx/file.tsx(43,6): error TS2322: Type '{ children: (string | Element)[]; a: number; b: string; }' is not assignable to type 'Prop'.
   Types of property 'children' are incompatible.
     Type '(string | Element)[]' is not assignable to type 'string | Element'.
-      Type '(string | Element)[]' is missing the following properties from type 'Element': type, props
+      Type '(string | Element)[]' is not assignable to type 'string'.
 tests/cases/conformance/jsx/file.tsx(49,6): error TS2322: Type '{ children: Element[]; a: number; b: string; }' is not assignable to type 'Prop'.
   Types of property 'children' are incompatible.
     Type 'Element[]' is not assignable to type 'string | Element'.
-      Type 'Element[]' is missing the following properties from type 'Element': type, props
+      Type 'Element[]' is not assignable to type 'string'.
 
 
 ==== tests/cases/conformance/jsx/file.tsx (6 errors) ====
@@ -59,7 +59,7 @@ tests/cases/conformance/jsx/file.tsx(49,6): error TS2322: Type '{ children: Elem
 !!! error TS2322: Type '{ children: (Element | ((name: string) => Element))[]; a: number; b: string; }' is not assignable to type 'Prop'.
 !!! error TS2322:   Types of property 'children' are incompatible.
 !!! error TS2322:     Type '(Element | ((name: string) => Element))[]' is not assignable to type 'string | Element'.
-!!! error TS2322:       Type '(Element | ((name: string) => Element))[]' is missing the following properties from type 'Element': type, props
+!!! error TS2322:       Type '(Element | ((name: string) => Element))[]' is not assignable to type 'string'.
             <div> My Div </div>
             {(name: string) => <div> My name {name} </div>}
         </Comp>;
@@ -70,7 +70,7 @@ tests/cases/conformance/jsx/file.tsx(49,6): error TS2322: Type '{ children: Elem
 !!! error TS2322: Type '{ children: (number | Element)[]; a: number; b: string; }' is not assignable to type 'Prop'.
 !!! error TS2322:   Types of property 'children' are incompatible.
 !!! error TS2322:     Type '(number | Element)[]' is not assignable to type 'string | Element'.
-!!! error TS2322:       Type '(number | Element)[]' is missing the following properties from type 'Element': type, props
+!!! error TS2322:       Type '(number | Element)[]' is not assignable to type 'string'.
             <div> My Div </div>
             {1000000}
         </Comp>;
@@ -81,7 +81,7 @@ tests/cases/conformance/jsx/file.tsx(49,6): error TS2322: Type '{ children: Elem
 !!! error TS2322: Type '{ children: (string | Element)[]; a: number; b: string; }' is not assignable to type 'Prop'.
 !!! error TS2322:   Types of property 'children' are incompatible.
 !!! error TS2322:     Type '(string | Element)[]' is not assignable to type 'string | Element'.
-!!! error TS2322:       Type '(string | Element)[]' is missing the following properties from type 'Element': type, props
+!!! error TS2322:       Type '(string | Element)[]' is not assignable to type 'string'.
             <div> My Div </div>
             hi hi hi!
         </Comp>;
@@ -92,7 +92,7 @@ tests/cases/conformance/jsx/file.tsx(49,6): error TS2322: Type '{ children: Elem
 !!! error TS2322: Type '{ children: Element[]; a: number; b: string; }' is not assignable to type 'Prop'.
 !!! error TS2322:   Types of property 'children' are incompatible.
 !!! error TS2322:     Type 'Element[]' is not assignable to type 'string | Element'.
-!!! error TS2322:       Type 'Element[]' is missing the following properties from type 'Element': type, props
+!!! error TS2322:       Type 'Element[]' is not assignable to type 'string'.
             <div> My Div </div>
             <div> My Div </div>
         </Comp>;
\ No newline at end of file
diff --git a/tests/baselines/reference/iteratorSpreadInArray6.errors.txt b/tests/baselines/reference/iteratorSpreadInArray6.errors.txt
index b151757c98f..4f547c59ed0 100644
--- a/tests/baselines/reference/iteratorSpreadInArray6.errors.txt
+++ b/tests/baselines/reference/iteratorSpreadInArray6.errors.txt
@@ -1,5 +1,9 @@
 tests/cases/conformance/es6/spread/iteratorSpreadInArray6.ts(15,14): error TS2345: Argument of type 'symbol[]' is not assignable to parameter of type 'number | ConcatArray<number>'.
-  Type 'symbol[]' is not assignable to type 'number'.
+  Type 'symbol[]' is not assignable to type 'ConcatArray<number>'.
+    Types of property 'slice' are incompatible.
+      Type '(start?: number, end?: number) => symbol[]' is not assignable to type '(start?: number, end?: number) => number[]'.
+        Type 'symbol[]' is not assignable to type 'number[]'.
+          Type 'symbol' is not assignable to type 'number'.
 
 
 ==== tests/cases/conformance/es6/spread/iteratorSpreadInArray6.ts (1 errors) ====
@@ -20,4 +24,8 @@ tests/cases/conformance/es6/spread/iteratorSpreadInArray6.ts(15,14): error TS234
     array.concat([...new SymbolIterator]);
                  ~~~~~~~~~~~~~~~~~~~~~~~
 !!! error TS2345: Argument of type 'symbol[]' is not assignable to parameter of type 'number | ConcatArray<number>'.
-!!! error TS2345:   Type 'symbol[]' is not assignable to type 'number'.
\ No newline at end of file
+!!! error TS2345:   Type 'symbol[]' is not assignable to type 'ConcatArray<number>'.
+!!! error TS2345:     Types of property 'slice' are incompatible.
+!!! error TS2345:       Type '(start?: number, end?: number) => symbol[]' is not assignable to type '(start?: number, end?: number) => number[]'.
+!!! error TS2345:         Type 'symbol[]' is not assignable to type 'number[]'.
+!!! error TS2345:           Type 'symbol' is not assignable to type 'number'.
\ No newline at end of file