1 files changed, 22 insertions, 2 deletions
diff --git a/src/csharp/GrpcCoreTests/GrpcEnvironmentTest.cs b/src/csharp/GrpcCoreTests/GrpcEnvironmentTest.cs
index 781d1fc109..1bc6cce401 100644
--- a/src/csharp/GrpcCoreTests/GrpcEnvironmentTest.cs
+++ b/src/csharp/GrpcCoreTests/GrpcEnvironmentTest.cs
@@ -42,10 +42,30 @@ namespace Google.GRPC.Core.Tests
     {
         [Test]
         public void InitializeAndShutdownGrpcEnvironment() {
-            GrpcEnvironment.EnsureInitialized();
-            Thread.Sleep(500);
+            GrpcEnvironment.Initialize();
             Assert.IsNotNull(GrpcEnvironment.ThreadPool.CompletionQueue);
             GrpcEnvironment.Shutdown();
         }
+
+        [Test]
+        public void SubsequentInvocations() {
+            GrpcEnvironment.Initialize();
+            GrpcEnvironment.Initialize();
+            GrpcEnvironment.Shutdown();
+            GrpcEnvironment.Shutdown();
+        }
+
+        [Test]
+        public void InitializeAfterShutdown() {
+            GrpcEnvironment.Initialize();
+            var tp1 = GrpcEnvironment.ThreadPool;
+            GrpcEnvironment.Shutdown();
+
+            GrpcEnvironment.Initialize();
+            var tp2 = GrpcEnvironment.ThreadPool;
+            GrpcEnvironment.Shutdown();
+
+            Assert.IsFalse(Object.ReferenceEquals(tp1, tp2));
+        }
     }
 }