diff --git a/scripts/lib/clean-linux-hopper-runtime.d.mts b/scripts/lib/clean-linux-hopper-runtime.d.mts
index d2177fad4..dd74f2772 100644
--- a/scripts/lib/clean-linux-hopper-runtime.d.mts
+++ b/scripts/lib/clean-linux-hopper-runtime.d.mts
@@ -1,4 +1,5 @@
 export function assertCleanLinuxHopperRuntime(
   launcherPaths?: readonly string[],
   procRoot?: string,
+  listProcesses?: () => Promise<{ stdout: string }>,
 ): Promise<void>;