6 files changed, 7 insertions, 11 deletions
diff --git a/test/cpp/interop/client.cc b/test/cpp/interop/client.cc
index 1df2fc8320..8a00b61cef 100644
--- a/test/cpp/interop/client.cc
+++ b/test/cpp/interop/client.cc
@@ -34,8 +34,6 @@
 #include <memory>
 #include <unordered_map>
 
-#include <unistd.h>
-
 #include <gflags/gflags.h>
 #include <grpc++/channel.h>
 #include <grpc++/client_context.h>
diff --git a/test/cpp/interop/client_helper.cc b/test/cpp/interop/client_helper.cc
index 91564e5dce..d3192ad0c9 100644
--- a/test/cpp/interop/client_helper.cc
+++ b/test/cpp/interop/client_helper.cc
@@ -33,8 +33,6 @@
 
 #include "test/cpp/interop/client_helper.h"
 
-#include <unistd.h>
-
 #include <fstream>
 #include <memory>
 #include <sstream>
diff --git a/test/cpp/interop/interop_client.cc b/test/cpp/interop/interop_client.cc
index aa34d94f61..b7f2723c39 100644
--- a/test/cpp/interop/interop_client.cc
+++ b/test/cpp/interop/interop_client.cc
@@ -31,7 +31,6 @@
  *
  */
 
-#include <unistd.h>
 #include <cinttypes>
 #include <fstream>
 #include <memory>
@@ -43,6 +42,7 @@
 #include <grpc/support/alloc.h>
 #include <grpc/support/log.h>
 #include <grpc/support/string_util.h>
+#include <grpc/support/time.h>
 #include <grpc/support/useful.h>
 
 #include "src/core/lib/transport/byte_stream.h"
@@ -618,7 +618,9 @@ bool InteropClient::DoResponseStreamingWithSlowConsumer() {
     GPR_ASSERT(response.payload().body() ==
                grpc::string(kResponseMessageSize, '\0'));
     gpr_log(GPR_DEBUG, "received message %d", i);
-    usleep(kReceiveDelayMilliSeconds * 1000);
+    gpr_sleep_until(gpr_time_add(
+        gpr_now(GPR_CLOCK_REALTIME),
+        gpr_time_from_millis(kReceiveDelayMilliSeconds, GPR_TIMESPAN)));
     ++i;
   }
 
diff --git a/test/cpp/interop/interop_server.cc b/test/cpp/interop/interop_server.cc
index 1810cd076f..77e309dde4 100644
--- a/test/cpp/interop/interop_server.cc
+++ b/test/cpp/interop/interop_server.cc
@@ -31,8 +31,6 @@
  *
  */
 
-#include <unistd.h>
-
 #include <fstream>
 #include <memory>
 #include <sstream>
@@ -45,6 +43,7 @@
 #include <grpc++/server_context.h>
 #include <grpc/grpc.h>
 #include <grpc/support/log.h>
+#include <grpc/support/time.h>
 #include <grpc/support/useful.h>
 
 #include "src/core/lib/support/string.h"
@@ -348,6 +347,7 @@ void grpc::testing::interop::RunServer(
   std::unique_ptr<Server> server(builder.BuildAndStart());
   gpr_log(GPR_INFO, "Server listening on %s", server_address.str().c_str());
   while (!gpr_atm_no_barrier_load(&g_got_sigint)) {
-    sleep(5);
+    gpr_sleep_until(gpr_time_add(gpr_now(GPR_CLOCK_REALTIME),
+                                 gpr_time_from_seconds(5, GPR_TIMESPAN)));
   }
 }
diff --git a/test/cpp/interop/interop_server_bootstrap.cc b/test/cpp/interop/interop_server_bootstrap.cc
index 99518c6943..7cbf221a03 100644
--- a/test/cpp/interop/interop_server_bootstrap.cc
+++ b/test/cpp/interop/interop_server_bootstrap.cc
@@ -32,7 +32,6 @@
  */
 
 #include <signal.h>
-#include <unistd.h>
 
 #include "test/cpp/interop/server_helper.h"
 #include "test/cpp/util/test_config.h"
diff --git a/test/cpp/interop/reconnect_interop_server.cc b/test/cpp/interop/reconnect_interop_server.cc
index 53d51e80e7..634d0a90fc 100644
--- a/test/cpp/interop/reconnect_interop_server.cc
+++ b/test/cpp/interop/reconnect_interop_server.cc
@@ -34,7 +34,6 @@
 // Test description at doc/connection-backoff-interop-test-description.md
 
 #include <signal.h>
-#include <unistd.h>
 
 #include <condition_variable>
 #include <memory>