diff --git a/src/main/electron-app/electron-app.global-override-for-injectable.ts b/src/main/electron-app/electron-app.global-override-for-injectable.ts
index ea74c209e1..c7cc065cb2 100644
--- a/src/main/electron-app/electron-app.global-override-for-injectable.ts
+++ b/src/main/electron-app/electron-app.global-override-for-injectable.ts
@@ -9,4 +9,11 @@ import electronAppInjectable from "./electron-app.injectable";
 export default getGlobalOverride(electronAppInjectable, () => ({
   getVersion: () => "6.0.0",
   setLoginItemSettings: () => {},
+  commandLine: {
+    appendArgument: () => {},
+    appendSwitch: () => {},
+    getSwitchValue: () => "",
+    hasSwitch: () => false,
+    removeSwitch: () => {},
+  },
 } as Partial<Electron.App> as Electron.App));
diff --git a/src/main/start-main-application/runnables/setup-hostnames.injectable.ts b/src/main/start-main-application/runnables/setup-hostnames.injectable.ts
index bcb08a1bc4..265ff49162 100644
--- a/src/main/start-main-application/runnables/setup-hostnames.injectable.ts
+++ b/src/main/start-main-application/runnables/setup-hostnames.injectable.ts
@@ -15,7 +15,7 @@ const setupHostnamesInjectable = getInjectable({
     return {
       id: "setup-hostnames",
       run: () => {
-        app.commandLine?.appendSwitch("host-rules", [
+        app.commandLine.appendSwitch("host-rules", [
           "MAP localhost 127.0.0.1",
           "MAP lens.app 127.0.0.1",
           "MAP *.lens.app 127.0.0.1",