diff --git a/src/compiler/program.ts b/src/compiler/program.ts
index 40a1bdcafff..b08f966864a 100644
--- a/src/compiler/program.ts
+++ b/src/compiler/program.ts
@@ -618,7 +618,7 @@ namespace ts {
         // A parallel array to projectReferences storing the results of reading in the referenced tsconfig files
         const resolvedProjectReferences: (ResolvedProjectReference | undefined)[] | undefined = projectReferences ? [] : undefined;
         const projectReferenceRedirects: Map<string> = createMap();
-        
+
         const shouldCreateNewSourceFile = shouldProgramCreateNewSourceFiles(oldProgram, options);
         const structuralIsReused = tryReuseStructureFromOldProgram();
         if (structuralIsReused !== StructureIsReused.Completely) {
diff --git a/src/harness/vfs.ts b/src/harness/vfs.ts
index 0e16b0fe715..2c1c6f2dd54 100644
--- a/src/harness/vfs.ts
+++ b/src/harness/vfs.ts
@@ -1155,7 +1155,7 @@ namespace vfs {
         EROFS: "file system is read-only"
     });
 
-    export function createIOError(code: keyof typeof IOErrorMessages, details: string = "") {
+    export function createIOError(code: keyof typeof IOErrorMessages, details = "") {
         const err: NodeJS.ErrnoException = new Error(`${code}: ${IOErrorMessages[code]} ${details}`);
         err.code = code;
         if (Error.captureStackTrace) Error.captureStackTrace(err, createIOError);