diff --git a/src/compiler/program.ts b/src/compiler/program.ts
index 3fd6658572a..971e9ca4d69 100644
--- a/src/compiler/program.ts
+++ b/src/compiler/program.ts
@@ -2035,10 +2035,9 @@ namespace ts {
                 const includeBindAndCheckDiagnostics = !isTsNoCheck && (sourceFile.scriptKind === ScriptKind.TS || sourceFile.scriptKind === ScriptKind.TSX
                         || sourceFile.scriptKind === ScriptKind.External || isPlainJs || isCheckJs || sourceFile.scriptKind === ScriptKind.Deferred);
                 let bindDiagnostics: readonly Diagnostic[] = includeBindAndCheckDiagnostics ? sourceFile.bindDiagnostics : emptyArray;
-                let checkDiagnostics = includeBindAndCheckDiagnostics ? typeChecker.getDiagnostics(sourceFile, cancellationToken) : emptyArray;
+                let checkDiagnostics = includeBindAndCheckDiagnostics && !isPlainJs ? typeChecker.getDiagnostics(sourceFile, cancellationToken) : emptyArray;
                 if (isPlainJs) {
                     bindDiagnostics = filter(bindDiagnostics, d => plainJSErrors.has(d.code));
-                    checkDiagnostics = filter(checkDiagnostics, d => plainJSErrors.has(d.code));
                 }
                 // skip ts-expect-error errors in plain JS files, and skip JSDoc errors except in checked JS
                 return getMergedBindAndCheckDiagnostics(sourceFile, includeBindAndCheckDiagnostics && !isPlainJs, bindDiagnostics, checkDiagnostics, isCheckJs ? sourceFile.jsDocDiagnostics : undefined);
diff --git a/tests/baselines/reference/plainJSReservedStrict.errors.txt b/tests/baselines/reference/plainJSReservedStrict.errors.txt
index a040fce591c..db4714a10c1 100644
--- a/tests/baselines/reference/plainJSReservedStrict.errors.txt
+++ b/tests/baselines/reference/plainJSReservedStrict.errors.txt
@@ -1,16 +1,12 @@
 tests/cases/conformance/salsa/plainJSReservedStrict.js(2,7): error TS1100: Invalid use of 'eval' in strict mode.
-tests/cases/conformance/salsa/plainJSReservedStrict.js(2,7): error TS2451: Cannot redeclare block-scoped variable 'eval'.
 tests/cases/conformance/salsa/plainJSReservedStrict.js(3,7): error TS1100: Invalid use of 'arguments' in strict mode.
 
 
-==== tests/cases/conformance/salsa/plainJSReservedStrict.js (3 errors) ====
+==== tests/cases/conformance/salsa/plainJSReservedStrict.js (2 errors) ====
     "use strict"
     const eval = 1
           ~~~~
 !!! error TS1100: Invalid use of 'eval' in strict mode.
-          ~~~~
-!!! error TS2451: Cannot redeclare block-scoped variable 'eval'.
-!!! related TS6203 /.ts/lib.es5.d.ts:32:18: 'eval' was also declared here.
     const arguments = 2
           ~~~~~~~~~
 !!! error TS1100: Invalid use of 'arguments' in strict mode.