diff --git a/packages/common/src/extensionDependencies.ts b/packages/common/src/extensionDependencies.ts
index d748061247..a62060bc0c 100644
--- a/packages/common/src/extensionDependencies.ts
+++ b/packages/common/src/extensionDependencies.ts
@@ -1,13 +1,4 @@
 export const extensionDependencies = [
   // Cursorless access to Tree sitter
   "pokey.parse-tree",
-
-  // Register necessary language-IDs for tests
-  "scala-lang.scala", // scala
-  "mrob95.vscode-talonscript", // talon
-  "jrieken.vscode-tree-sitter-query", // scm
-  "mathiasfrohlich.kotlin", // kotlin
-
-  // Necessary for the `drink cell` and `pour cell` tests
-  "ms-toolsai.jupyter",
 ];
diff --git a/packages/cursorless-vscode/package.json b/packages/cursorless-vscode/package.json
index 376e617135..6f348480b8 100644
--- a/packages/cursorless-vscode/package.json
+++ b/packages/cursorless-vscode/package.json
@@ -1227,7 +1227,24 @@
           "group": "navigation"
         }
       ]
-    }
+    },
+    "languages": [
+      {
+        "id": "talon"
+      },
+      {
+        "id": "talon-list"
+      },
+      {
+        "id": "scala"
+      },
+      {
+        "id": "kotlin"
+      },
+      {
+        "id": "scm"
+      }
+    ]
   },
   "scripts": {
     "build": "pnpm run esbuild:prod && pnpm -F cheatsheet-local build:prod && pnpm -F cursorless-vscode-tutorial-webview build:prod && pnpm run populate-dist",
diff --git a/packages/cursorless-vscode/src/scripts/initLaunchSandbox.ts b/packages/cursorless-vscode/src/scripts/initLaunchSandbox.ts
index 1d66902383..3566d80069 100644
--- a/packages/cursorless-vscode/src/scripts/initLaunchSandbox.ts
+++ b/packages/cursorless-vscode/src/scripts/initLaunchSandbox.ts
@@ -21,13 +21,16 @@ async function main() {
       }
     });
 
-    let extensions = [...extensionDependencies, "pokey.command-server"];
+    const extensions = [
+      ...extensionDependencies,
+      "pokey.command-server",
+      "mrob95.vscode-talonscript",
+    ];
 
     // Do not attempt to install jrieken:vscode-tree-sitter-query if editor is NOT VSCode, assuming lack of access to VSCode Marketplace
-    if (cliToolName !== vsCodeToolName) {
-      extensions = extensions.filter(
-        (e) => e !== "jrieken.vscode-tree-sitter-query",
-      );
+    if (cliToolName === vsCodeToolName) {
+      extensions.push("jrieken.vscode-tree-sitter-query");
+    } else {
       console.log(
         "Not installing jrieken:vscode-tree-sitter-query as it is not on the OpenVSX Marketplace.",
       );