diff --git a/src/test/mocks/mockChildProcess.ts b/src/test/mocks/mockChildProcess.ts
new file mode 100644
index 000000000000..01c10372c9f7
--- /dev/null
+++ b/src/test/mocks/mockChildProcess.ts
@@ -0,0 +1,190 @@
+/* eslint-disable @typescript-eslint/no-unused-vars */
+/* eslint-disable @typescript-eslint/no-explicit-any */
+import { Serializable, SendHandle } from 'child_process';
+import { Writable, Readable, Pipe } from 'stream';
+import { EventEmitter, MessageOptions } from 'vscode';
+
+export class MockChildProcess extends EventEmitter<T> {
+    constructor(spawnfile: string, spawnargs: string[]) {
+        super();
+        this.spawnfile = spawnfile;
+        this.spawnargs = spawnargs;
+        this.stdin = null;
+        this.stdout = null;
+        this.stderr = null;
+        this.channel = null;
+        this.stdio = [null, this.stdin, this.stdout, this.stderr, null];
+        this.killed = false;
+        this.connected = false;
+        this.exitCode = null;
+        this.signalCode = null;
+        this.listenerList = [];
+    }
+
+    stdin: Writable | null;
+
+    stdout: Readable | null;
+
+    stderr: Readable | null;
+
+    listenerList: unknown[];
+
+    readonly channel?: Pipe | null | undefined;
+
+    readonly stdio: [
+        Writable | null,
+        // stdin
+        Readable | null,
+        // stdout
+        Readable | null,
+        // stderr
+        Readable | Writable | null | undefined,
+        // extra
+        Readable | Writable | null | undefined, // extra
+    ];
+
+    readonly killed: boolean;
+
+    readonly pid?: number | undefined;
+
+    readonly connected: boolean;
+
+    readonly exitCode: number | null;
+
+    readonly signalCode: NodeJS.Signals | null;
+
+    readonly spawnargs: string[];
+
+    readonly spawnfile: string;
+
+    signal?: NodeJS.Signals | number;
+
+    send(message: Serializable, callback?: (error: Error | null) => void): boolean;
+
+    send(message: Serializable, sendHandle?: SendHandle, callback?: (error: Error | null) => void): boolean;
+
+    send(
+        message: Serializable,
+        // eslint-disable-next-line @typescript-eslint/no-unused-vars
+        sendHandle?: SendHandle,
+        // eslint-disable-next-line @typescript-eslint/no-unused-vars
+        options?: MessageOptions,
+        // eslint-disable-next-line @typescript-eslint/no-unused-vars
+        callback?: (error: Error | null) => void,
+    ): boolean {
+        this.stdin = new Writable();
+        this.stdin.write(message.toString());
+        return true;
+    }
+
+    // eslint-disable-next-line class-methods-use-this
+    disconnect(): void {
+        /* noop */
+    }
+
+    // eslint-disable-next-line class-methods-use-this
+    unref(): void {
+        /* noop */
+    }
+
+    // eslint-disable-next-line class-methods-use-this
+    ref(): void {
+        /* noop */
+    }
+
+    addListener(event: string, listener: (...args: any[]) => void): this {
+        return this;
+    }
+
+    addListener(event: 'close', listener: (code: number | null, signal: NodeJS.Signals | null) => void): this;
+
+    addListener(event: 'disconnect', listener: () => void): this;
+
+    addListener(event: 'error', listener: (err: Error) => void): this;
+
+    addListener(event: 'exit', listener: (code: number | null, signal: NodeJS.Signals | null) => void): this;
+
+    addListener(event: 'message', listener: (message: Serializable, sendHandle: SendHandle) => void): this;
+
+    addListener(event: 'spawn', listener: () => void): this;
+
+    emit(event: string | symbol, ...args: unknown[]): boolean;
+
+    emit(event: 'close', code: number | null, signal: NodeJS.Signals | null): boolean;
+
+    emit(event: 'disconnect'): boolean;
+
+    emit(event: 'error', err: Error): boolean;
+
+    emit(event: 'exit', code: number | null, signal: NodeJS.Signals | null): boolean;
+
+    emit(event: 'message', message: Serializable, sendHandle: SendHandle): boolean;
+
+    emit(event: 'spawn', listener: () => void): boolean {
+        /* noop */
+        this.emit(event);
+        return true;
+    }
+
+    on(event: string, listener: (...args: any[]) => void): this {
+        this.listenerList.push({ event, listener });
+        return this;
+    }
+
+    on(event: 'close', listener: (code: number | null, signal: NodeJS.Signals | null) => void): this;
+
+    on(event: 'disconnect', listener: () => void): this;
+
+    on(event: 'error', listener: (err: Error) => void): this;
+
+    on(event: 'exit', listener: (code: number | null, signal: NodeJS.Signals | null) => void): this;
+
+    on(event: 'message', listener: (message: Serializable, sendHandle: SendHandle) => void): this;
+
+    on(event: 'spawn', listener: () => void): this;
+
+    once(event: string, listener: (...args: any[]) => void): this {
+        this.listenerList.push({ event, listener });
+        return this;
+    }
+
+    once(event: 'close', listener: (code: number | null, signal: NodeJS.Signals | null) => void): this;
+
+    once(event: 'disconnect', listener: () => void): this;
+
+    once(event: 'error', listener: (err: Error) => void): this;
+
+    once(event: 'exit', listener: (code: number | null, signal: NodeJS.Signals | null) => void): this;
+
+    once(event: 'message', listener: (message: Serializable, sendHandle: SendHandle) => void): this;
+
+    once(event: 'spawn', listener: () => void): this;
+
+    prependListener(event: string, listener: (...args: any[]) => void): this;
+
+    prependListener(event: 'close', listener: (code: number | null, signal: NodeJS.Signals | null) => void): this;
+
+    prependListener(event: 'disconnect', listener: () => void): this;
+
+    prependListener(event: 'error', listener: (err: Error) => void): this;
+
+    prependListener(event: 'exit', listener: (code: number | null, signal: NodeJS.Signals | null) => void): this;
+
+    prependListener(event: 'message', listener: (message: Serializable, sendHandle: SendHandle) => void): this;
+
+    prependListener(event: 'spawn', listener: () => void): this;
+
+    prependOnceListener(event: string, listener: (...args: any[]) => void): this;
+
+    prependOnceListener(event: 'close', listener: (code: number | null, signal: NodeJS.Signals | null) => void): this;
+
+    prependOnceListener(event: 'disconnect', listener: () => void): this;
+
+    prependOnceListener(event: 'error', listener: (err: Error) => void): this;
+
+    prependOnceListener(event: 'exit', listener: (code: number | null, signal: NodeJS.Signals | null) => void): this;
+
+    prependOnceListener(event: 'message', listener: (message: Serializable, sendHandle: SendHandle) => void): this;
+
+    prependOnceListener(event: 'spawn', listener: () => void): this;
+}