diff --git a/extensions/ql-vscode/src/mocks/gh-api-request.ts b/extensions/ql-vscode/src/mocks/gh-api-request.ts
new file mode 100644
index 00000000000..0f322f990fd
--- /dev/null
+++ b/extensions/ql-vscode/src/mocks/gh-api-request.ts
@@ -0,0 +1,55 @@
+import { Repository } from '../remote-queries/gh-api/repository';
+import { VariantAnalysis, VariantAnalysisRepoTask } from '../remote-queries/gh-api/variant-analysis';
+
+// Types that represent requests/responses from the GitHub API
+// that we need to mock.
+
+export enum RequestKind {
+  GetRepo = 'getRepo',
+  SubmitVariantAnalysis = 'submitVariantAnalysis',
+  GetVariantAnalysis = 'getVariantAnalysis',
+  GetVariantAnalysisRepo = 'getVariantAnalysisRepo',
+  GetVariantAnalysisRepoResult = 'getVariantAnalysisRepoResult',
+}
+
+export interface GetRepoRequest {
+  request: {
+    kind: RequestKind.GetRepo
+  },
+  response: {
+    status: number,
+    body: Repository
+  }
+}
+
+export interface GetVariantAnalysisRequest {
+  request: {
+    kind: RequestKind.GetVariantAnalysis
+  },
+  response: {
+    status: number,
+    body: VariantAnalysis
+  }
+}
+
+export interface GetVariantAnalysisRepoRequest {
+  request: {
+    kind: RequestKind.GetVariantAnalysisRepo,
+    repositoryId: number
+  },
+  response: {
+    status: number,
+    body: VariantAnalysisRepoTask
+  }
+}
+
+export interface GetVariantAnalysisRepoResultRequest {
+  request: {
+    kind: RequestKind.GetVariantAnalysisRepoResult,
+    repositoryId: number
+  },
+  response: {
+    status: number,
+    body: ArrayBuffer
+  }
+}