diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 4190681..9ab4120 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -26,12 +26,15 @@ jobs:
         needs: [pre-commit]
 
         runs-on: ubuntu-latest
-        timeout-minutes: 10
+        timeout-minutes: 30
 
         strategy:
             fail-fast: false
             matrix:
                 python-version: ['3.8', '3.9', '3.10']
+                default-image:
+                    - ''  # use the application default
+                    - aiidalab/aiidalab-docker-stack:latest
 
         steps:
 
@@ -52,7 +55,7 @@ jobs:
 
             - name: Run tests
               run: |
-                  pytest -v --slow
+                  pytest -v --slow --default-image=${{ matrix.default-image }}
                   coverage xml
 
             - name: Upload coverage to Codecov
diff --git a/aiidalab_launch/instance.py b/aiidalab_launch/instance.py
index fd225b7..16d8aa6 100644
--- a/aiidalab_launch/instance.py
+++ b/aiidalab_launch/instance.py
@@ -214,7 +214,8 @@ def _run_post_start(self) -> None:
             LOGGER.warning(
                 "Failed to ensure ~/.conda directory is owned by the system user."
             )
-        LOGGER.debug("The ~/.conda directory is owned by the system user.")
+        else:
+            LOGGER.debug("The ~/.conda directory is owned by the system user.")
 
     def stop(self, timeout: float | None = None) -> None:
         self._requires_container()
@@ -270,7 +271,7 @@ def exec_create(self, cmd: str, privileged: bool = False) -> str:
             return self.client.api.exec_create(
                 self.container.id,
                 cmd,
-                user=None if privileged else self.profile.system_user,
+                user="root" if privileged else self.profile.system_user,
                 workdir=None if privileged else f"/home/{self.profile.system_user}",
             )["Id"]
         except docker.errors.APIError:
@@ -291,7 +292,9 @@ async def _init_scripts_finished(container: Container) -> None:
         result = await loop.run_in_executor(
             None, container.exec_run, "wait-for-services"
         )
-        if result.exit_code != 0:
+        if result.exit_code in (126, 127):
+            LOGGER.debug("Container does not support wait-for-services script.")
+        elif result.exit_code != 0:
             raise FailedToWaitForServices(
                 "Failed to check for init processes to complete."
             )
diff --git a/aiidalab_launch/profile.py b/aiidalab_launch/profile.py
index 7a4aa05..985f81e 100644
--- a/aiidalab_launch/profile.py
+++ b/aiidalab_launch/profile.py
@@ -10,6 +10,7 @@
 import toml
 from docker.models.containers import Container
 
+from .core import LOGGER
 from .util import docker_mount_for, get_docker_env, is_volume_readonly
 
 MAIN_PROFILE_NAME = "default"
@@ -30,7 +31,7 @@ def _default_port() -> int:  # explicit function required to enable test patchin
     return DEFAULT_PORT
 
 
-_DEFAULT_IMAGE = "aiidalab/aiidalab-docker-stack:latest"
+_DEFAULT_IMAGE = "aiidalab/full-stack:latest"
 
 
 def _valid_volume_name(source: str) -> None:
@@ -65,7 +66,7 @@ class Profile:
     name: str = MAIN_PROFILE_NAME
     port: int | None = field(default_factory=_default_port)
     default_apps: list[str] = field(default_factory=lambda: ["aiidalab-widgets-base"])
-    system_user: str = "aiida"
+    system_user: str = "jovyan"
     image: str = _DEFAULT_IMAGE
     home_mount: str | None = None
     extra_mounts: set[str] = field(default_factory=set)
@@ -93,6 +94,14 @@ def __post_init__(self):
                 self.extra_mounts.remove(extra_mount)
                 self.extra_mounts.add(f"{extra_mount}:rw")
 
+        if (
+            self.image.split(":")[0] == "aiidalab/full-stack"
+            and self.system_user != "jovyan"
+        ):
+            LOGGER.warning(
+                "Resetting the system user may create issues for this image!"
+            )
+
     def container_name(self) -> str:
         return f"{CONTAINER_PREFIX}{self.name}"
 
@@ -127,6 +136,7 @@ def environment(self, jupyter_token: str) -> dict:
             "AIIDALAB_DEFAULT_APPS": " ".join(self.default_apps),
             "JUPYTER_TOKEN": str(jupyter_token),
             "SYSTEM_USER": self.system_user,
+            "NB_USER": self.system_user,
         }
 
     def dumps(self) -> str:
diff --git a/tests/conftest.py b/tests/conftest.py
index 5327532..7eca9e1 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -57,6 +57,16 @@ def docker_client():
         pytest.skip("docker not available")
 
 
+@pytest.fixture(autouse=True)
+def _select_default_image(monkeypatch_session, pytestconfig):
+    _default_image = pytestconfig.getoption("default_image")
+    if _default_image is not None:
+        monkeypatch_session.setattr(
+            aiidalab_launch.profile, "_DEFAULT_IMAGE", _default_image
+        )
+    yield None
+
+
 @pytest.fixture(scope="session", autouse=True)
 def _pull_docker_image(docker_client):
     try:
@@ -250,6 +260,11 @@ def pytest_addoption(parser):
         default=False,
         help="Enable long running tests.",
     )
+    parser.addoption(
+        "--default-image",
+        action="store",
+        help="Select the default image to test against.",
+    )
 
 
 def pytest_configure(config):
diff --git a/tests/test_cli.py b/tests/test_cli.py
index 36c155d..0e4c00f 100644
--- a/tests/test_cli.py
+++ b/tests/test_cli.py
@@ -161,11 +161,11 @@ def test_status(self, started_instance):
         assert started_instance.profile.home_mount in result.output
         assert started_instance.url() in result.output
 
-    def test_exec(self):
+    def test_exec(self, started_instance):
         runner: CliRunner = CliRunner()
         result: Result = runner.invoke(cli.cli, ["exec", "--", "whoami"])
         assert result.exit_code == 0
-        assert "aiida" in result.output
+        assert started_instance.profile.system_user in result.output
 
     def test_logs(self):
         runner: CliRunner = CliRunner()
diff --git a/tests/test_config.py b/tests/test_config.py
index 8205261..6bb0076 100644
--- a/tests/test_config.py
+++ b/tests/test_config.py
@@ -13,7 +13,7 @@
         port = 8888
         default_apps = [ "aiidalab-widgets-base",]
         system_user = "aiida"
-        image = "aiidalab/aiidalab-docker-stack:latest"
+        image = "aiidalab/full-stack:edge"
         home_mount = "aiidalab_default_home"
         """
 }
diff --git a/tests/test_instance.py b/tests/test_instance.py
index 16ae263..4bda23e 100644
--- a/tests/test_instance.py
+++ b/tests/test_instance.py
@@ -122,7 +122,7 @@ async def test_profile_configuration_changes(instance):
     assert not any(instance.configuration_changes())
 
     # Change image
-    instance.profile.image = "aiidalab/aiidalab-docker-stack:1234"
+    instance.profile.image = "aiidalab/full-stack:1234"
     assert "Profile configuration has changed." in instance.configuration_changes()
     instance.profile = deepcopy(original_profile)
     assert not any(instance.configuration_changes())
@@ -159,7 +159,10 @@ def test_instance_host_ports(self, started_instance):
 
     def test_instance_exec_create(self, docker_client, started_instance):
         exec_id = started_instance.exec_create(cmd="whoami")
-        assert docker_client.api.exec_start(exec_id).decode().strip() == "aiida"
+        assert (
+            docker_client.api.exec_start(exec_id).decode().strip()
+            == started_instance.profile.system_user
+        )
 
         exec_id_privileged = started_instance.exec_create(cmd="whoami", privileged=True)
         assert (