diff --git a/script/spec-runner.js b/script/spec-runner.js
index 139a3d55572f..50af2359c8e7 100755
--- a/script/spec-runner.js
+++ b/script/spec-runner.js
@@ -21,7 +21,7 @@ const specHashPath = path.resolve(__dirname, '../spec/.hash')
 
 let runnersToRun = null
 if (args.runners) {
-  runnersToRun = args.only.split(',')
+  runnersToRun = args.runners.split(',')
   console.log('Only running:', runnersToRun)
 } else {
   console.log('Will trigger all spec runners')
diff --git a/spec-main/api-app-spec.ts b/spec-main/api-app-spec.ts
index 7cbb24f1d8db..02b55ad5c213 100644
--- a/spec-main/api-app-spec.ts
+++ b/spec-main/api-app-spec.ts
@@ -226,7 +226,7 @@ describe('app module', () => {
       const [code1] = await firstExited
       expect(code1).to.equal(0)
       const data2 = (await data2Promise)[0].toString('ascii')
-      const secondInstanceArgsReceived = JSON.parse(data2.toString('ascii'))
+      const secondInstanceArgsReceived: string[] = JSON.parse(data2.toString('ascii'))
       const expected = process.platform === 'win32'
         ? [process.execPath, '--some-switch', '--allow-file-access-from-files', secondInstanceArgsReceived.find(x => x.includes('original-process-start-time')), appPath, 'some-arg']
         : secondInstanceArgs