diff --git a/solara/server/telemetry.py b/solara/server/telemetry.py
index c69e059da..d553fa247 100644
--- a/solara/server/telemetry.py
+++ b/solara/server/telemetry.py
@@ -15,6 +15,7 @@
 import requests
 
 import solara
+import solara.util
 
 from . import settings
 
@@ -44,15 +45,6 @@
 _compute_platform = "unknown"
 
 
-def is_running_in_colab():
-    try:
-        import google.colab  # noqa
-
-        return True
-    except ImportError:
-        return False
-
-
 def is_running_on_domino():
     return "DOMINO_PROJECT_OWNER" in os.environ
 
@@ -65,7 +57,7 @@ def is_running_on_azure():
     return "AZURE_NOTEBOOKS_VM" in os.environ or "AZUREML_RUN_ID" in os.environ
 
 
-if is_running_in_colab():
+if solara.util.is_running_in_colab():
     _compute_platform = "colab"
 elif is_running_on_domino():
     _compute_platform = "domino"
@@ -74,7 +66,7 @@ def is_running_on_azure():
 elif is_running_on_azure():
     _compute_platform = "azure"
 
-_vscode = any(k for k in os.environ if k.upper().startswith("VSCODE_"))
+_vscode = solara.util.is_running_in_vscode()
 
 try:
     path = "/proc/self/cgroup"
diff --git a/solara/settings.py b/solara/settings.py
index 98349bac6..36f3fbdc2 100644
--- a/solara/settings.py
+++ b/solara/settings.py
@@ -1,6 +1,8 @@
 import os
 from typing import Optional
 
+import solara.util
+
 from .minisettings import BaseSettings, Field
 from .util import get_solara_home
 
@@ -36,9 +38,13 @@ class Config:
         env_file = ".env"
 
 
+# in colab or vscode there is not solara cdn proxy available
+_should_use_proxy = not (solara.util.is_running_in_colab() or solara.util.is_running_in_vscode() or solara.util.is_running_in_voila())
+
+
 class Assets(BaseSettings):
     cdn: str = "https://cdn.jsdelivr.net/npm/"
-    proxy: bool = True
+    proxy: bool = _should_use_proxy
 
     class Config:
         env_prefix = "solara_assets_"
diff --git a/solara/util.py b/solara/util.py
index bf2cbc097..84f32c826 100644
--- a/solara/util.py
+++ b/solara/util.py
@@ -267,3 +267,20 @@ def get_file_hash(path: Path, algorithm="md5") -> Tuple[bytes, str]:
         h = hashlib.new(algorithm, usedforsecurity=False)  # type: ignore
     h.update(data)
     return data, h.hexdigest()
+
+
+def is_running_in_colab():
+    try:
+        import google.colab  # noqa
+
+        return True
+    except ImportError:
+        return False
+
+
+def is_running_in_vscode():
+    return "VSCODE_PID" in os.environ or "VSCODE_CWD" in os.environ
+
+
+def is_running_in_voila():
+    return os.environ.get("SERVER_SOFTWARE", "").startswith("voila")
diff --git a/solara/widgets/vue/vegalite.vue b/solara/widgets/vue/vegalite.vue
index ad9f09a7d..87fa0c557 100644
--- a/solara/widgets/vue/vegalite.vue
+++ b/solara/widgets/vue/vegalite.vue
@@ -108,7 +108,7 @@ module.exports = {
             return base
         },
         getCdn() {
-            return (typeof solara_cdn !== "undefined" && solara_cdn) || `${this.getBaseUrl()}_solara/cdn`;
+            return this.cdn || (typeof solara_cdn !== "undefined" && solara_cdn) || `${this.getBaseUrl()}_solara/cdn`;
         }
     },
 }
diff --git a/solara/widgets/widgets.py b/solara/widgets/widgets.py
index b4e2533b3..1f6eeda37 100644
--- a/solara/widgets/widgets.py
+++ b/solara/widgets/widgets.py
@@ -20,6 +20,7 @@ class VegaLite(v.VuetifyTemplate):
     listen_to_hover = traitlets.Bool(False).tag(sync=True)
     on_click = traitlets.traitlets.Callable(None, allow_none=True)
     on_hover = traitlets.traitlets.Callable(None, allow_none=True)
+    cdn = traitlets.Unicode(None, allow_none=True).tag(sync=True)
 
     def vue_altair_click(self, *args):
         if self.on_click:
@@ -29,6 +30,13 @@ def vue_altair_hover(self, *args):
         if self.on_hover:
             self.on_hover(*args)
 
+    @traitlets.default("cdn")
+    def _cdn(self):
+        import solara.settings
+
+        if not solara.settings.assets.proxy:
+            return solara.settings.assets.cdn
+
 
 class Navigator(v.VuetifyTemplate):
     template_file = os.path.realpath(os.path.join(os.path.dirname(__file__), "vue/navigator.vue"))
diff --git a/tests/integration/cdn_test.py b/tests/integration/cdn_test.py
index 2fa801753..a0a8dd1a6 100644
--- a/tests/integration/cdn_test.py
+++ b/tests/integration/cdn_test.py
@@ -10,9 +10,6 @@
 def test_cdn_via_altair(ipywidgets_runner, page_session: playwright.sync_api.Page, request, assert_solara_snapshot):
     if request.node.callspec.params["ipywidgets_runner"] != "solara" and request.node.callspec.params["solara_server"] != SERVERS[0]:
         pytest.skip("No need to run this test for all servers.")
-    if request.node.callspec.params["ipywidgets_runner"] == "voila":
-        # see https://github.com/widgetti/solara/issues/486
-        pytest.skip("Does not work with Voila.")
 
     # this function (or rather its lines) will be executed in the kernel
     # voila, lab, classic notebook and solara will all execute it