diff --git a/smartsim/_core/launcher_/slurm/slurm_launcher.py b/smartsim/_core/launcher_/slurm/slurm_launcher.py
index ee1dac5d7..24dcacaef 100644
--- a/smartsim/_core/launcher_/slurm/slurm_launcher.py
+++ b/smartsim/_core/launcher_/slurm/slurm_launcher.py
@@ -33,6 +33,8 @@
 import time
 import typing as t
 
+from typing_extensions import TypeAlias
+
 from smartsim._core.config import CONFIG
 from smartsim._core.launcher_.slurm import slurm_commands as commands
 from smartsim._core.launcher_.slurm import slurm_parser as parser
@@ -118,7 +120,7 @@ def start(self) -> None:
         )
 
 
-_SlurmCommandType: t.TypeAlias = SrunCommand
+_SlurmCommandType: TypeAlias = SrunCommand
 """Types that are capable of being launched by the `SlurmLauncher`"""
 
 
diff --git a/tests/test_slurm_launcher.py b/tests/test_slurm_launcher.py
index a4152ac8b..70c8102c0 100644
--- a/tests/test_slurm_launcher.py
+++ b/tests/test_slurm_launcher.py
@@ -126,6 +126,7 @@ def test_slurm_launcher_can_start_a_command(monkeypatch, make_srun_command):
     )
     launcher = SlurmLauncher()
     srun = make_srun_command(["-N", "1", "-n", "1"], ["echo", "spam", "eggs"])
+    monkeypatch.setattr(srun, "start", lambda *_, **__: ...)
     id_ = launcher.start(srun)
     info = launcher._launched[id_]
     assert info.slurm_id == "mock-step-id"
@@ -145,6 +146,7 @@ def test_slurm_launcher_errors_if_cannot_parse_id(monkeypatch, make_srun_command
     monkeypatch.setattr(time, "sleep", lambda *_, **__: ...)
     launcher = SlurmLauncher()
     srun = make_srun_command(["-N", "1", "-n", "1"], ["echo", "spam", "eggs"])
+    monkeypatch.setattr(srun, "start", lambda *_, **__: ...)
     with pytest.raises(
         errors.LauncherError, match=r"Could not find id of launched job step"
     ):