diff --git a/src/compiler/checker.ts b/src/compiler/checker.ts
index 8422e42c175..2ad9334676d 100644
--- a/src/compiler/checker.ts
+++ b/src/compiler/checker.ts
@@ -7888,7 +7888,7 @@ namespace ts {
                     // assignable to the JSX Element Type
                     const callSignature = getSingleCallSignature(getTypeOfSymbol(sym));
                     const callReturnType = callSignature && getReturnTypeOfSignature(callSignature);
-                    let paramType = callReturnType && callSignature && (callSignature.parameters.length === 0 ? emptyObjectType : getTypeOfSymbol(callSignature.parameters[0]));
+                    let paramType = callReturnType && (callSignature.parameters.length === 0 ? emptyObjectType : getTypeOfSymbol(callSignature.parameters[0]));
                     if (callReturnType && isTypeAssignableTo(callReturnType, jsxElementType) && (paramType.flags & TypeFlags.ObjectType)) {
                         // Intersect in JSX.IntrinsicAttributes if it exists
                         const intrinsicAttributes = getJsxType(JsxNames.IntrinsicAttributes);
diff --git a/src/harness/harness.ts b/src/harness/harness.ts
index d4d6c89a20f..fafe4257d74 100644
--- a/src/harness/harness.ts
+++ b/src/harness/harness.ts
@@ -1119,10 +1119,10 @@ namespace Harness {
 
                 // Files from tests\lib that are requested by "@libFiles"
                 if (options.libFiles) {
-                    ts.forEach(options.libFiles.split(","), filename => {
-                        const libFileName = "tests/lib/" + filename;
+                    for (const fileName of options.libFiles.split(",")) {
+                        const libFileName = "tests/lib/" + fileName;
                         includeBuiltFiles.push({ unitName: libFileName, content: normalizeLineEndings(IO.readFile(libFileName), newLine) });
-                    });
+                    }
                 }