diff --git a/spec/core/TreeRunnerSpec.js b/spec/core/TreeRunnerSpec.js
index 17e6e3bc..d9184845 100644
--- a/spec/core/TreeRunnerSpec.js
+++ b/spec/core/TreeRunnerSpec.js
@@ -2,46 +2,22 @@ describe('TreeRunner', function() {
   describe('spec execution', function() {
     it('starts the timer, reports the spec started, and updates run state at the start of the queue', async function() {
       const timer = jasmine.createSpyObj('timer', ['start']);
-      const topSuiteId = 'suite1';
       const spec = new jasmineUnderTest.Spec({
         id: 'spec1',
-        parentSuiteId: topSuiteId,
         queueableFn: {},
         timer
       });
-      const topSuite = new jasmineUnderTest.Suite({ id: topSuiteId });
-      topSuite.addChild(spec);
-      const executionTree = {
-        topSuite,
-        childrenOfTopSuite() {
-          return [{ spec }];
-        },
-        isExcluded() {
-          return false;
-        }
-      };
-      const runQueue = jasmine.createSpy('runQueue');
-      const reportDispatcher = mockReportDispatcher();
-      const runableResources = mockRunableResources();
-      const currentRunableTracker = new jasmineUnderTest.CurrentRunableTracker();
-      const subject = new jasmineUnderTest.TreeRunner({
-        executionTree,
+      const {
         runQueue,
+        currentRunableTracker,
         runableResources,
         reportDispatcher,
-        currentRunableTracker,
-        getConfig() {
-          return {};
-        },
-        reportChildrenOfBeforeAllFailure() {}
-      });
-
-      const promise = subject.execute();
-      expect(runQueue).toHaveBeenCalledTimes(1);
-      const suiteRunQueueArgs = runQueue.calls.mostRecent().args[0];
+        suiteRunQueueArgs,
+        executePromise
+      } = runSingleSpecSuite(spec);
       suiteRunQueueArgs.queueableFns[0].fn();
 
-      expect(runQueue).toHaveBeenCalledTimes(2);
+      expect(runQueue).toHaveBeenCalledTimes(1);
       const specRunQueueArgs = runQueue.calls.mostRecent().args[0];
       const next = jasmine.createSpy('next');
       specRunQueueArgs.queueableFns[0].fn(next);
@@ -50,56 +26,33 @@ describe('TreeRunner', function() {
       expect(currentRunableTracker.currentRunable()).toBe(spec);
       expect(runableResources.initForRunable).toHaveBeenCalledWith(
         spec.id,
-        topSuite.id
+        spec.parentSuiteId
       );
       expect(reportDispatcher.specStarted).toHaveBeenCalledWith(spec.result);
       await Promise.resolve();
       expect(reportDispatcher.specStarted).toHaveBeenCalledBefore(next);
-      await expectAsync(promise).toBePending();
+      await expectAsync(executePromise).toBePending();
     });
 
     it('stops the timer, updates run state, and reports the spec done at the end of the queue', async function() {
       const timer = jasmine.createSpyObj('timer', ['start', 'elapsed']);
-      const topSuiteId = 'suite1';
       const spec = new jasmineUnderTest.Spec({
         id: 'spec1',
-        parentSuiteId: topSuiteId,
         queueableFn: {},
         timer
       });
-      const topSuite = new jasmineUnderTest.Suite({ id: topSuiteId });
-      topSuite.addChild(spec);
-      const executionTree = {
-        topSuite,
-        childrenOfTopSuite() {
-          return [{ spec }];
-        },
-        isExcluded() {
-          return false;
-        }
-      };
-      const runQueue = jasmine.createSpy('runQueue');
-      const reportDispatcher = mockReportDispatcher();
-      const runableResources = mockRunableResources();
-      const currentRunableTracker = new jasmineUnderTest.CurrentRunableTracker();
-      const subject = new jasmineUnderTest.TreeRunner({
-        executionTree,
+      const {
         runQueue,
+        currentRunableTracker,
         runableResources,
         reportDispatcher,
-        currentRunableTracker,
-        getConfig() {
-          return {};
-        },
-        reportChildrenOfBeforeAllFailure() {}
-      });
+        suiteRunQueueArgs,
+        executePromise
+      } = runSingleSpecSuite(spec);
 
-      const promise = subject.execute();
-      expect(runQueue).toHaveBeenCalledTimes(1);
-      const suiteRunQueueArgs = runQueue.calls.mostRecent().args[0];
       suiteRunQueueArgs.queueableFns[0].fn();
 
-      expect(runQueue).toHaveBeenCalledTimes(2);
+      expect(runQueue).toHaveBeenCalledTimes(1);
       const specRunQueueArgs = runQueue.calls.mostRecent().args[0];
       const next = jasmine.createSpy('next');
       timer.elapsed.and.returnValue('the elapsed time');
@@ -115,8 +68,53 @@ describe('TreeRunner', function() {
       await Promise.resolve();
       await Promise.resolve();
       expect(reportDispatcher.specDone).toHaveBeenCalledBefore(next);
-      await expectAsync(promise).toBePending();
+      await expectAsync(executePromise).toBePending();
     });
+
+    function runSingleSpecSuite(spec) {
+      const topSuiteId = 'suite1';
+      spec.parentSuiteId = topSuiteId;
+      const topSuite = new jasmineUnderTest.Suite({ id: topSuiteId });
+      topSuite.addChild(spec);
+      const executionTree = {
+        topSuite,
+        childrenOfTopSuite() {
+          return [{ spec }];
+        },
+        isExcluded() {
+          return false;
+        }
+      };
+      const runQueue = jasmine.createSpy('runQueue');
+      const reportDispatcher = mockReportDispatcher();
+      const runableResources = mockRunableResources();
+      const currentRunableTracker = new jasmineUnderTest.CurrentRunableTracker();
+      const subject = new jasmineUnderTest.TreeRunner({
+        executionTree,
+        runQueue,
+        runableResources,
+        reportDispatcher,
+        currentRunableTracker,
+        getConfig() {
+          return {};
+        },
+        reportChildrenOfBeforeAllFailure() {}
+      });
+
+      const executePromise = subject.execute();
+      expect(runQueue).toHaveBeenCalledTimes(1);
+      const suiteRunQueueArgs = runQueue.calls.mostRecent().args[0];
+      runQueue.calls.reset();
+
+      return {
+        runQueue,
+        currentRunableTracker,
+        runableResources,
+        reportDispatcher,
+        suiteRunQueueArgs,
+        executePromise
+      };
+    }
   });
 
   function mockReportDispatcher() {