diff --git a/.github/integration-test.py b/.github/integration-test.py
index 39d27f4..fcb8768 100755
--- a/.github/integration-test.py
+++ b/.github/integration-test.py
@@ -167,7 +167,7 @@ def run_test(
         command = f"python3 /srv/src/bootstrap/bootstrap.py --version={upgrade_from}"
         run_command(container_name, command)
 
-    command = f"python3 /srv/src/bootstrap/bootstrap.py {installer_args}"
+    command = f"python3 /srv/src/bootstrap/bootstrap.py {' '.join(installer_args)}"
     run_command(container_name, command)
 
     # Install pkgs from requirements in hub's pip, where
@@ -219,7 +219,7 @@ def main():
     copy_parser.add_argument("dest")
 
     run_test_parser = subparsers.add_parser("run-test")
-    run_test_parser.add_argument("--installer-args", default="")
+    run_test_parser.add_argument("--installer-args", action="append")
     run_test_parser.add_argument("--upgrade-from", default="")
     run_test_parser.add_argument("--bootstrap-pip-spec", default="/srv/src")
     run_test_parser.add_argument("container_name")
diff --git a/integration-tests/test_admin_installer.py b/integration-tests/test_admin_installer.py
index 88ca9e7..8314bfa 100644
--- a/integration-tests/test_admin_installer.py
+++ b/integration-tests/test_admin_installer.py
@@ -12,8 +12,8 @@ async def test_admin_login():
     Test if the admin that was added during install can login with
     the password provided.
     """
-    username = "admin"
-    password = "admin"
+    username = "test-admin-username"
+    password = "test-admin-password"
 
     async with User(username, hub_url, partial(login_dummy, password=password)) as u:
         await u.login()
@@ -24,8 +24,8 @@ async def test_admin_login():
 @pytest.mark.parametrize(
     "username, password",
     [
-        ("admin", ""),
-        ("admin", "wrong_passw"),
+        ("test-admin-username", ""),
+        ("test-admin-username", "wrong_passw"),
         ("user", "password"),
     ],
 )
diff --git a/tljh/installer.py b/tljh/installer.py
index 33cce12..dc787f4 100644
--- a/tljh/installer.py
+++ b/tljh/installer.py
@@ -284,7 +284,7 @@ def ensure_user_environment(user_requirements_txt_file):
 
 def ensure_admins(admin_password_list):
     """
-    Setup given list of users as admins.
+    Setup given list of user[:password] strings as admins.
     """
     os.makedirs(STATE_DIR, mode=0o700, exist_ok=True)