diff --git a/src/execCmd.ts b/src/execCmd.ts
index 58c1553b..019b08b4 100644
--- a/src/execCmd.ts
+++ b/src/execCmd.ts
@@ -114,7 +114,7 @@ const getExitCodeError = (cmd: string, expectedCode: number, output: ShellString
  *
  * If the cli is 'inherit', the executable preference order is:
  *    1. TESTKIT_EXECUTABLE_PATH env var
- *    2. `bin/dev.js` (default)
+ *    2. `bin/run.js` (default)
  *
  * @returns The command string with CLI executable. E.g., `"node_modules/bin/sf org:create:user -a testuser1"`
  */
@@ -124,11 +124,11 @@ const determineExecutable = (cli: CLI = 'inherit'): string => {
   let bin =
     cli === 'inherit'
       ? env.getString('TESTKIT_EXECUTABLE_PATH') ??
-        pathJoin(process.cwd(), 'bin', process.platform === 'win32' ? 'dev.cmd' : 'dev.js')
+        pathJoin(process.cwd(), 'bin', process.platform === 'win32' ? 'run.cmd' : 'run.js')
       : cli;
 
-  // Support plugins who still use bin/dev instead of bin/dev.js
-  if (bin.endsWith('dev.js') && !fs.existsSync(bin)) bin = bin.replace('.js', '');
+  // Support plugins who still use bin/run instead of bin/run.js
+  if (bin.endsWith('run.js') && !fs.existsSync(bin)) bin = bin.replace('.js', '');
   const which = shelljs.which(bin);
   let resolvedPath = pathResolve(bin);
 
diff --git a/src/testSession.ts b/src/testSession.ts
index ced2532e..1b3eab4e 100644
--- a/src/testSession.ts
+++ b/src/testSession.ts
@@ -156,22 +156,16 @@ export class TestSession<T extends TestSessionOptions = TestSessionOptions> exte
         projectDir = this.project.dir;
       }
 
-      // The default bin/dev in execCmd will no longer resolve properly when
+      // The default bin/run in execCmd will no longer resolve properly when
       // a test project is used since process.cwd is changed.  If the
       // TESTKIT_EXECUTABLE_PATH env var is not being used, then set it
       // to use the bin/dev from the cwd now.
       if (!env.getString('TESTKIT_EXECUTABLE_PATH')) {
-        let binDev = path.join(process.cwd(), 'bin', 'dev');
-        if (!fs.existsSync(binDev)) {
-          binDev += '.js';
-        }
-
-        // only used in the case when bin/dev or bin/dev.js doesn't exist
         let binRun = path.join(process.cwd(), 'bin', 'run');
         if (!fs.existsSync(binRun)) {
           binRun += '.js';
         }
-        env.setString('TESTKIT_EXECUTABLE_PATH', fs.existsSync(binDev) ? binDev : binRun);
+        env.setString('TESTKIT_EXECUTABLE_PATH', binRun);
       }
 
       this.stubCwd(projectDir);