diff --git a/cpp/src/arrow/c/bridge_test.cc b/cpp/src/arrow/c/bridge_test.cc
index 31bf1112dfa0b..bc60b587cf6f7 100644
--- a/cpp/src/arrow/c/bridge_test.cc
+++ b/cpp/src/arrow/c/bridge_test.cc
@@ -5378,6 +5378,8 @@ TEST_F(TestAsyncDeviceArrayStreamRoundTrip, Simple) {
   ASSERT_EQ(results.size(), 2);
   AssertBatchesEqual(*results[0].batch, *batches[0]);
   AssertBatchesEqual(*results[1].batch, *batches[1]);
+
+  internal::GetCpuThreadPool()->WaitForIdle();
 }
 
 TEST_F(TestAsyncDeviceArrayStreamRoundTrip, NullSchema) {
@@ -5415,6 +5417,8 @@ TEST_F(TestAsyncDeviceArrayStreamRoundTrip, PropagateError) {
   auto collect_fut = CollectAsyncGenerator(generator.generator);
   ASSERT_FINISHES_AND_RAISES(UnknownError, collect_fut);
   ASSERT_FINISHES_AND_RAISES(UnknownError, fut);
+
+  internal::GetCpuThreadPool()->WaitForIdle();
 }
 
 }  // namespace arrow