diff --git a/src/node/Launcher.ts b/src/node/Launcher.ts
index fad95bdc45fe6..64b15e6b22973 100644
--- a/src/node/Launcher.ts
+++ b/src/node/Launcher.ts
@@ -71,8 +71,8 @@ class ChromeLauncher implements ProductLauncher {
       ignoreDefaultArgs = false,
       args = [],
       dumpio = false,
-      channel = null,
-      executablePath = null,
+      channel,
+      executablePath,
       pipe = false,
       env = process.env,
       handleSIGINT = true,
@@ -83,7 +83,7 @@ class ChromeLauncher implements ProductLauncher {
       slowMo = 0,
       timeout = 30000,
       waitForInitialPage = true,
-      debuggingPort = null,
+      debuggingPort,
     } = options;
 
     const chromeArguments = [];
@@ -133,26 +133,9 @@ class ChromeLauncher implements ProductLauncher {
 
     isTempUserDataDir = false;
 
-    let chromeExecutable = executablePath;
-
-    if (channel) {
-      // executablePath is detected by channel, so it should not be specified by user.
-      assert(
-        typeof executablePath === 'string',
-        '`executablePath` must not be specified when `channel` is given.'
-      );
-
-      chromeExecutable = executablePathForChannel(channel);
-    } else if (!executablePath) {
-      const { missingText, executablePath } = resolveExecutablePath(this);
-      if (missingText) throw new Error(missingText);
-      chromeExecutable = executablePath;
-    }
-
-    if (!chromeExecutable) {
-      throw new Error('chromeExecutable is not found.');
-    }
-
+    const chromeExecutable = !executablePath
+      ? this.executablePath(channel)
+      : executablePath;
     const usePipe = chromeArguments.includes('--remote-debugging-pipe');
     const runner = new BrowserRunner(
       this.product,
@@ -262,7 +245,11 @@ class ChromeLauncher implements ProductLauncher {
     if (channel) {
       return executablePathForChannel(channel);
     } else {
-      return resolveExecutablePath(this).executablePath;
+      const results = resolveExecutablePath(this);
+      if (results.missingText) {
+        throw new Error(results.missingText);
+      }
+      return results.executablePath;
     }
   }