diff --git a/extensions/ql-vscode/src/test-ui.ts b/extensions/ql-vscode/src/test-ui.ts
index 102053fec..5739d438f 100644
--- a/extensions/ql-vscode/src/test-ui.ts
+++ b/extensions/ql-vscode/src/test-ui.ts
@@ -14,7 +14,6 @@ import {
 import { showAndLogWarningMessage } from "./helpers";
 import { TestTreeNode } from "./test-tree-node";
 import { DisposableObject } from "./pure/disposable-object";
-import { UIService } from "./vscode-utils/ui-service";
 import { QLTestAdapter, getExpectedFile, getActualFile } from "./test-adapter";
 import { TestUICommands } from "./common/commands";
 
@@ -42,7 +41,7 @@ class QLTestListener extends DisposableObject {
 /**
  * Service that implements all UI and commands for QL tests.
  */
-export class TestUIService extends UIService implements TestController {
+export class TestUIService extends DisposableObject implements TestController {
   private readonly listeners: Map<TestAdapter, QLTestListener> = new Map();
 
   constructor(private readonly testHub: TestHub) {
diff --git a/extensions/ql-vscode/src/vscode-utils/ui-service.ts b/extensions/ql-vscode/src/vscode-utils/ui-service.ts
deleted file mode 100644
index c2ffef0c8..000000000
--- a/extensions/ql-vscode/src/vscode-utils/ui-service.ts
+++ /dev/null
@@ -1,32 +0,0 @@
-import { TreeDataProvider, window } from "vscode";
-import { DisposableObject } from "../pure/disposable-object";
-import { commandRunner } from "../commandRunner";
-
-/**
- * A VS Code service that interacts with the UI, including handling commands.
- */
-export class UIService extends DisposableObject {
-  protected constructor() {
-    super();
-  }
-
-  /**
-   * Registers a command handler with Visual Studio Code.
-   * @param command The ID of the command to register.
-   * @param callback Callback function to implement the command.
-   * @remarks The command handler is automatically unregistered when the service is disposed.
-   */
-  protected registerCommand(
-    command: string,
-    callback: (...args: any[]) => any,
-  ): void {
-    this.push(commandRunner(command, callback.bind(this)));
-  }
-
-  protected registerTreeDataProvider<T>(
-    viewId: string,
-    treeDataProvider: TreeDataProvider<T>,
-  ): void {
-    this.push(window.registerTreeDataProvider<T>(viewId, treeDataProvider));
-  }
-}