diff --git a/src/glicid_spawner/micromamba.py b/src/glicid_spawner/micromamba.py
index e72d328..0f62bb4 100644
--- a/src/glicid_spawner/micromamba.py
+++ b/src/glicid_spawner/micromamba.py
@@ -7,7 +7,6 @@ from pathlib import Path
 MICROMAMBA_ROOT = Path('/micromamba')  # default micromamba root location
 
 GLOBAL_USER = 'operator'
-GLOBAL_EXCLUDED = 'glicid-jupyterhub'
 
 
 @dataclass
@@ -19,15 +18,9 @@ class MicromambaEnv:
     path: str
 
 
-def _envs(folder, excluded=None) -> list:
-    """List micromamba environments."""
-    # Convert excluded as as list
-    if excluded is None:
-        excluded = []
-    elif isinstance(excluded, str):
-        excluded = [excluded]
-
-    # Get micromamba envs as pathlib.Path
+def _envs(folder) -> list:
+    """List micromamba environments with jupyter kernel(s)."""
+    # Get micromamba environments as pathlib.Path folders
     envs = MICROMAMBA_ROOT / folder / 'envs'
 
     if not envs.exists():
@@ -37,7 +30,7 @@ def _envs(folder, excluded=None) -> list:
         [
             (env.name, str(env))
             for env in envs.iterdir()
-            if env.is_dir() and env.name not in excluded
+            if env.is_dir() and any(env.glob('share/jupyter/kernels/*/kernel.json'))
         ],
         key=itemgetter(0),
     )
@@ -64,10 +57,7 @@ def _envs_team(username: str) -> list:
 
 def _envs_global() -> list:
     """Micromamba environment(s) available globally."""
-    return [
-        MicromambaEnv('GLOBAL', name, path)
-        for name, path in _envs(GLOBAL_USER, excluded=GLOBAL_EXCLUDED)
-    ]
+    return [MicromambaEnv('GLOBAL', name, path) for name, path in _envs(GLOBAL_USER)]
 
 
 def get_envs(username: str) -> list:
diff --git a/tests/data/micromamba/global/envs/baz/.gitkeep b/tests/data/micromamba/global/envs/baz/.gitkeep
deleted file mode 100644
index e69de29..0000000
diff --git a/tests/data/micromamba/global/envs/baz/share/jupyter/kernels/python3/kernel.json b/tests/data/micromamba/global/envs/baz/share/jupyter/kernels/python3/kernel.json
new file mode 100644
index 0000000..f336126
--- /dev/null
+++ b/tests/data/micromamba/global/envs/baz/share/jupyter/kernels/python3/kernel.json
@@ -0,0 +1,14 @@
+{
+    "argv": [
+        "/micromamba/global/envs/baz/bin/python",
+        "-m",
+        "ipykernel_launcher",
+        "-f",
+        "{connection_file}"
+    ],
+    "display_name": "Baz (GLOBAL)",
+    "language": "python",
+    "metadata": {
+        "debugger": true
+    }
+}
diff --git a/tests/data/micromamba/john-doe/envs/bar/.gitkeep b/tests/data/micromamba/john-doe/envs/bar/.gitkeep
deleted file mode 100644
index e69de29..0000000
diff --git a/tests/data/micromamba/john-doe/envs/bar/share/jupyter/kernels/python3/kernel.json b/tests/data/micromamba/john-doe/envs/bar/share/jupyter/kernels/python3/kernel.json
new file mode 100644
index 0000000..8f2c6c8
--- /dev/null
+++ b/tests/data/micromamba/john-doe/envs/bar/share/jupyter/kernels/python3/kernel.json
@@ -0,0 +1,14 @@
+{
+    "argv": [
+        "/micromamba/john-doe/envs/bar/bin/python",
+        "-m",
+        "ipykernel_launcher",
+        "-f",
+        "{connection_file}"
+    ],
+    "display_name": "Bar (USER)",
+    "language": "python",
+    "metadata": {
+        "debugger": true
+    }
+}
diff --git a/tests/data/micromamba/john-doe/envs/foo/.gitkeep b/tests/data/micromamba/john-doe/envs/foo/.gitkeep
deleted file mode 100644
index e69de29..0000000
diff --git a/tests/data/micromamba/john-doe/envs/foo/share/jupyter/kernels/foo/kernel.json b/tests/data/micromamba/john-doe/envs/foo/share/jupyter/kernels/foo/kernel.json
new file mode 100644
index 0000000..1a5806c
--- /dev/null
+++ b/tests/data/micromamba/john-doe/envs/foo/share/jupyter/kernels/foo/kernel.json
@@ -0,0 +1,14 @@
+{
+    "argv": [
+        "/micromamba/john-doe/envs/foo/bin/python",
+        "-m",
+        "ipykernel_launcher",
+        "-f",
+        "{connection_file}"
+    ],
+    "display_name": "Custom Foo (USER)",
+    "language": "python",
+    "metadata": {
+        "debugger": true
+    }
+}
diff --git a/tests/test_micromamba.py b/tests/test_micromamba.py
index 2229abd..60e6a37 100644
--- a/tests/test_micromamba.py
+++ b/tests/test_micromamba.py
@@ -11,15 +11,15 @@ def test_micromamba_envs_getter(monkeypatch):
     """Test micromamba envs getter."""
     monkeypatch.setattr(micromamba, 'MICROMAMBA_ROOT', MICROMAMBA_ROOT)
     monkeypatch.setattr(micromamba, 'GLOBAL_USER', 'global')
-    monkeypatch.setattr(micromamba, 'GLOBAL_EXCLUDED', 'qux')
 
     # User with micromamba envs
     envs = micromamba.get_envs('john-doe')
 
     assert len(envs) == 3
     assert [env.scope for env in envs] == ['USER', 'USER', 'GLOBAL']
-    assert [env.name for env in envs] == ['bar', 'foo', 'baz']
+    assert [env.name for env in envs] == ['bar', 'foo', 'baz']  # `qux` doesn't have `kernel.json`
     assert [env.path for env in envs] == [
+        # Sorted by groups (user > team > global)
         str(MICROMAMBA_ROOT / 'john-doe' / 'envs' / 'bar'),
         str(MICROMAMBA_ROOT / 'john-doe' / 'envs' / 'foo'),
         str(MICROMAMBA_ROOT / 'global' / 'envs' / 'baz'),