diff --git a/tests/test_subprocess_executor.py b/tests/test_subprocess_executor.py
index a214ecfb..18554c24 100644
--- a/tests/test_subprocess_executor.py
+++ b/tests/test_subprocess_executor.py
@@ -55,8 +55,8 @@ def test_shell_executor(self):
         with SubprocessExecutor(max_workers=2) as exe:
             f_1 = exe.submit(["echo", "test_1"], universal_newlines=True)
             f_2 = exe.submit(["echo", "test_2"], universal_newlines=True)
-            f_3 = exe.submit(["sleep", "1", "&&", "echo", "test_3"], universal_newlines=True)
-            f_4 = exe.submit(["sleep", "1", "&&", "echo", "test_4"], universal_newlines=True)
+            f_3 = exe.submit(["sleep", "1;", "echo", "test_3"], universal_newlines=True)
+            f_4 = exe.submit(["sleep", "1;", "echo", "test_4"], universal_newlines=True)
             self.assertFalse(f_1.done())
             self.assertFalse(f_2.done())
             self.assertFalse(f_3.done())