diff --git a/src/await-remote-run.spec.ts b/src/await-remote-run.spec.ts
new file mode 100644
index 0000000..e5d4077
--- /dev/null
+++ b/src/await-remote-run.spec.ts
@@ -0,0 +1,139 @@
+import * as core from "@actions/core";
+import * as github from "@actions/github";
+import {
+  afterAll,
+  afterEach,
+  beforeEach,
+  describe,
+  expect,
+  it,
+  vi,
+} from "vitest";
+
+import {
+  fetchWorkflowRunActiveJobUrl,
+  fetchWorkflowRunActiveJobUrlRetry,
+  fetchWorkflowRunFailedJobs,
+  fetchWorkflowRunState,
+  init,
+  retryOnError,
+  WorkflowRunStatus,
+} from "./api.ts";
+import { mockLoggingFunctions } from "./test-utils/logging.mock.ts";
+import { getWorkflowRunStatusResult } from "./await-remote-run.ts";
+
+vi.mock("@actions/core");
+vi.mock("@actions/github");
+
+interface MockResponse {
+  data: any;
+  status: number;
+}
+
+const mockOctokit = {
+  rest: {
+    actions: {
+      getWorkflowRun: (_req?: any): Promise<MockResponse> => {
+        throw new Error("Should be mocked");
+      },
+      listJobsForWorkflowRun: (_req?: any): Promise<MockResponse> => {
+        throw new Error("Should be mocked");
+      },
+    },
+  },
+};
+
+describe("await-remote-run", () => {
+  const {
+    coreErrorLogMock,
+    coreWarningLogMock,
+    coreDebugLogMock,
+    assertOnlyCalled,
+    assertNoneCalled,
+  } = mockLoggingFunctions();
+
+  afterAll(() => {
+    vi.restoreAllMocks();
+  });
+
+  afterEach(() => {
+    vi.resetAllMocks();
+  });
+
+  describe("getWorkflowRunStatusResult", () => {
+    it("should return success on completed status", () => {
+      // Behaviour
+      const result = getWorkflowRunStatusResult(WorkflowRunStatus.Completed, 0);
+      if (!result.success) {
+        expect.fail();
+      }
+      expect(result.success).toStrictEqual(true);
+      expect(result.value).toStrictEqual(WorkflowRunStatus.Completed);
+
+      // Logging
+      assertOnlyCalled(coreDebugLogMock);
+      expect(coreDebugLogMock).toHaveBeenCalledOnce();
+      expect(coreDebugLogMock.mock.lastCall?.[0]).toMatchInlineSnapshot(
+        `"Run has completed"`,
+      );
+    });
+
+    it("should return inconclusive on queued status", () => {
+      // Behaviour
+      const result = getWorkflowRunStatusResult(WorkflowRunStatus.Queued, 0);
+      if (result.success) {
+        expect.fail();
+      }
+      expect(result.success).toStrictEqual(false);
+      expect(result.reason).toStrictEqual("inconclusive");
+
+      // Logging
+      assertOnlyCalled(coreDebugLogMock);
+      expect(coreDebugLogMock).toHaveBeenCalledOnce();
+      expect(coreDebugLogMock.mock.lastCall?.[0]).toMatchInlineSnapshot(
+        `"Run is queued to begin, attempt 0..."`,
+      );
+    });
+
+    it("should return inconclusive on in_progress status", () => {
+      // Behaviour
+      const result = getWorkflowRunStatusResult(
+        WorkflowRunStatus.InProgress,
+        0,
+      );
+      if (result.success) {
+        expect.fail();
+      }
+      expect(result.success).toStrictEqual(false);
+      expect(result.reason).toStrictEqual("inconclusive");
+
+      // Logging
+      assertOnlyCalled(coreDebugLogMock);
+      expect(coreDebugLogMock).toHaveBeenCalledOnce();
+      expect(coreDebugLogMock.mock.lastCall?.[0]).toMatchInlineSnapshot(
+        `"Run is in progress, attempt 0..."`,
+      );
+    });
+
+    it.each([
+      WorkflowRunStatus.Pending,
+      WorkflowRunStatus.Requested,
+      WorkflowRunStatus.Waiting,
+    ])("should return unsupported on %s status", (status) => {
+      // Behaviour
+      const result = getWorkflowRunStatusResult(status, 0);
+      if (result.success) {
+        expect.fail();
+      }
+      expect(result.success).toStrictEqual(false);
+      expect(result.reason).toStrictEqual("unsupported");
+
+      // Logging
+      assertOnlyCalled(coreDebugLogMock);
+      expect(coreDebugLogMock).toHaveBeenCalledOnce();
+      expect(coreDebugLogMock.mock.lastCall?.[0]).toStrictEqual(
+        `Run has returned an unsupported status: ${status}`,
+      );
+    });
+  });
+});
diff --git a/src/await-remote-run.ts b/src/await-remote-run.ts
index 6251b9f..90d3d73 100644
--- a/src/await-remote-run.ts
+++ b/src/await-remote-run.ts
@@ -10,19 +10,25 @@ import {
 import type { Result } from "./types.ts";
 import { sleep } from "./utils.ts";
 
-function getWorkflowRunStatusResult(
+export function getWorkflowRunStatusResult(
   status: WorkflowRunStatus | null,
   attemptNo: number,
 ): Result<WorkflowRunStatus> {
+  if (status === WorkflowRunStatus.Completed) {
+    core.debug("Run has completed");
+    return { success: true, value: status };
+  }
+
   if (status === WorkflowRunStatus.Queued) {
     core.debug(`Run is queued to begin, attempt ${attemptNo}...`);
+    return { success: false, reason: "inconclusive" };
   } else if (status === WorkflowRunStatus.InProgress) {
     core.debug(`Run is in progress, attempt ${attemptNo}...`);
-  } else if (status === WorkflowRunStatus.Completed) {
-    core.debug("Run has completed");
-    return { success: true, value: status };
+    return { success: false, reason: "inconclusive" };
   }
-  return { success: false, reason: "inconclusive" };
+
+  core.debug(`Run has returned an unsupported status: ${status}`);
+  return { success: false, reason: "unsupported" };
 }
 
 function getWorkflowRunConclusionResult(