diff --git a/tests/baselines/reference/jsFileCompilationTypeAssertions.errors.txt b/tests/baselines/reference/jsFileCompilationTypeAssertions.errors.txt
index de1e1038db6..6d4ef23dcc6 100644
--- a/tests/baselines/reference/jsFileCompilationTypeAssertions.errors.txt
+++ b/tests/baselines/reference/jsFileCompilationTypeAssertions.errors.txt
@@ -1,7 +1,7 @@
-tests/cases/compiler/a.js(1,10): error TS8016: 'type assertion expressions' can only be used in a .ts file.
+tests/cases/compiler/a.js(1,27): error TS17002: Expected corresponding JSX closing tag for 'string'.
 
 
 ==== tests/cases/compiler/a.js (1 errors) ====
     var v = <string>undefined;
-             ~~~~~~
-!!! error TS8016: 'type assertion expressions' can only be used in a .ts file.
\ No newline at end of file
+                              
+!!! error TS17002: Expected corresponding JSX closing tag for 'string'.
\ No newline at end of file
diff --git a/tests/cases/fourslash/getJavaScriptSemanticDiagnostics20.ts b/tests/cases/fourslash/getJavaScriptSemanticDiagnostics20.ts
index 790f02bac92..5172ee7701c 100644
--- a/tests/cases/fourslash/getJavaScriptSemanticDiagnostics20.ts
+++ b/tests/cases/fourslash/getJavaScriptSemanticDiagnostics20.ts
@@ -4,12 +4,13 @@
 // @Filename: a.js
 //// var v = <string>undefined;
 
-verify.getSemanticDiagnostics(`[
+verify.getSyntacticDiagnostics(`[
   {
-    "message": "'type assertion expressions' can only be used in a .ts file.",
-    "start": 9,
-    "length": 6,
+    "message": "Expected corresponding JSX closing tag for 'string'.",
+    "start": 26,
+    "length": 0,
     "category": "error",
-    "code": 8016
+    "code": 17002
   }
-]`);
\ No newline at end of file
+]`);
+verify.getSemanticDiagnostics(`[]`);
\ No newline at end of file