diff --git a/src/concurrency/resource-pool.spec.ts b/src/concurrency/resource-pool.spec.ts
index e78f0f8..f9f3a6e 100644
--- a/src/concurrency/resource-pool.spec.ts
+++ b/src/concurrency/resource-pool.spec.ts
@@ -37,7 +37,7 @@ describe(ResourcePool.name, () => {
         testee.use(() => wait(0.5e3));
         const becameEmpty = await testee.wait({ freeCount: 2 });
         expect(becameEmpty).toBeTruthy();
-        expect(Date.now() - start).toBeGreaterThan(0.5e3);
+        expect(Date.now() - start).toBeGreaterThanOrEqual(0.5e3);
       });
 
       it('returns false when other tasks running', async () => {
diff --git a/src/stress/orderBy.spec.ts b/src/stress/orderBy.spec.ts
deleted file mode 100644
index a8f1413..0000000
--- a/src/stress/orderBy.spec.ts
+++ /dev/null
@@ -1,12 +0,0 @@
-import { sortBy } from './sortBy';
-
-describe('orderBy', () => {
-  it('sorts value DESC by "natural" JS ordering', () => {
-    expect(sortBy([2, 3, 1], (v) => v)).toEqual([3, 2, 1]);
-    expect(sortBy([1, 1, 2], (v) => v)).toEqual([2, 1, 1]);
-  });
-  it('sorts value ASC by "natural" JS ordering', () => {
-    expect(sortBy([2, 3, 1], (v) => v, true)).toEqual([1, 2, 3]);
-    expect(sortBy([1, 1, 2], (v) => v, true)).toEqual([1, 1, 2]);
-  });
-});
diff --git a/src/stress/sortBy.spec.ts b/src/stress/sortBy.spec.ts
new file mode 100644
index 0000000..bd34033
--- /dev/null
+++ b/src/stress/sortBy.spec.ts
@@ -0,0 +1,12 @@
+import { sortBy } from './sortBy';
+
+describe('orderBy', () => {
+  it('sorts value DESC by "natural" JS ordering', () => {
+    expect(sortBy([2, 3, 1], (v) => v, false)).toEqual([3, 2, 1]);
+    expect(sortBy([1, 1, 2], (v) => v, false)).toEqual([2, 1, 1]);
+  });
+  it('sorts value ASC by "natural" JS ordering', () => {
+    expect(sortBy([2, 3, 1], (v) => v)).toEqual([1, 2, 3]);
+    expect(sortBy([1, 1, 2], (v) => v)).toEqual([1, 1, 2]);
+  });
+});