diff --git a/e2e/__helpers__/test-case/run-result.ts b/e2e/__helpers__/test-case/run-result.ts
index 948430ae96..3aa301542b 100644
--- a/e2e/__helpers__/test-case/run-result.ts
+++ b/e2e/__helpers__/test-case/run-result.ts
@@ -35,7 +35,9 @@ export default class RunResult {
   get stdout() { return stripAnsiColors((this.result.stdout || '').toString()) }
   get normalizedStdout() { return normalizeJestOutput(this.stdout) }
   get cmdLine() {
-    return [this.context.cmd, ...this.context.args].filter(a => !['-u', '--updateSnapshot'].includes(a)).join(' ')
+    return [this.context.cmd, ...this.context.args]
+      .filter(a => !['-u', '--updateSnapshot', '--runInBand'].includes(a))
+      .join(' ')
   }
 
   ioFor(relFilePath: string): ProcessedFileIo {
diff --git a/e2e/__helpers__/test-case/runtime.ts b/e2e/__helpers__/test-case/runtime.ts
index f220839db9..0ab61f8053 100644
--- a/e2e/__helpers__/test-case/runtime.ts
+++ b/e2e/__helpers__/test-case/runtime.ts
@@ -97,9 +97,9 @@ export function run(name: string, options: RunTestOptions = {}): RunResult {
   }
 
   // run in band
-  // if (!cmdArgs.includes('--runInBand')) {
-  //   cmdArgs.push('--runInBand')
-  // }
+  if (!cmdArgs.includes('--runInBand')) {
+    cmdArgs.push('--runInBand')
+  }
 
   const cmd = cmdArgs.shift() as string