diff --git a/include/grpc/support/port_platform.h b/include/grpc/support/port_platform.h
index 9c999b9c811e97b3908a02b305ef563f6482477a..9100f6e513cf86159acea4a483e811cc7517443e 100644
--- a/include/grpc/support/port_platform.h
+++ b/include/grpc/support/port_platform.h
@@ -45,9 +45,11 @@
 #if defined(_WIN64) || defined(WIN64)
 #define GPR_WIN32 1
 #define GPR_ARCH_64 1
+#define GPR_GETPID_IN_PROCESS_H 1
 #elif defined(_WIN32) || defined(WIN32)
 #define GPR_ARCH_32 1
 #define GPR_WIN32 1
+#define GPR_GETPID_IN_PROCESS_H 1
 #elif defined(ANDROID) || defined(__ANDROID__)
 #define GPR_ANDROID 1
 #define GPR_ARCH_32 1
@@ -61,6 +63,7 @@
 #define GPR_POSIX_STRING 1
 #define GPR_POSIX_SYNC 1
 #define GPR_POSIX_TIME 1
+#define GPR_GETPID_IN_UNISTD_H 1
 #elif defined(__linux__)
 #define GPR_CPU_LINUX 1
 #define GPR_GCC_ATOMIC 1
@@ -72,6 +75,7 @@
 #define GPR_POSIX_STRING 1
 #define GPR_POSIX_SYNC 1
 #define GPR_POSIX_TIME 1
+#define GPR_GETPID_IN_UNISTD_H 1
 #ifdef _LP64
 #define GPR_ARCH_64 1
 #else /* _LP64 */
@@ -89,6 +93,7 @@
 #define GPR_POSIX_STRING 1
 #define GPR_POSIX_SYNC 1
 #define GPR_POSIX_TIME 1
+#define GPR_GETPID_IN_UNISTD_H 1
 #ifdef _LP64
 #define GPR_ARCH_64 1
 #else /* _LP64 */
diff --git a/templates/vsprojects/vs2013/build_and_run_tests.bat.template b/templates/vsprojects/vs2013/build_and_run_tests.bat.template
index 8679bee3fc3966d89c8ecae747463042cc3e5549..4a15e01c522225fa2a0b71be68a953feb97d74ed 100644
--- a/templates/vsprojects/vs2013/build_and_run_tests.bat.template
+++ b/templates/vsprojects/vs2013/build_and_run_tests.bat.template
@@ -13,7 +13,7 @@
 
 @rem Build the library dependencies first
 MSBuild.exe gpr.vcxproj /p:Configuration=Debug
-MSBuild.exe grpc_test_util.vcxproj /p:Configuration=Debug
+MSBuild.exe gpr_test_util.vcxproj /p:Configuration=Debug
 
 mkdir ${test_bin_dir}
 
diff --git a/test/core/util/test_config.c b/test/core/util/test_config.c
index fc5de9bbefba5a43c1fbe7705251889e25a9a295..ab2c0d80a992ab1fa617b5d278acc7134479a8e4 100644
--- a/test/core/util/test_config.c
+++ b/test/core/util/test_config.c
@@ -33,11 +33,25 @@
 
 #include "test/core/util/test_config.h"
 
+#include <grpc/support/port_platform.h>
 #include <stdlib.h>
+
+#if GPR_GETPID_IN_UNISTD_H
 #include <unistd.h>
+static int seed() {
+  return getpid();
+}
+#endif
+
+#if GPR_GETPID_IN_PROCESS_H
+#include <process.h>
+static int seed(void) {
+  return _getpid();
+}
+#endif
 
 void grpc_test_init(int argc, char **argv) {
   /* seed rng with pid, so we don't end up with the same random numbers as a
      concurrently running test binary */
-  srand(getpid());
+  srand(seed());
 }
diff --git a/vsprojects/vs2013/build_and_run_tests.bat b/vsprojects/vs2013/build_and_run_tests.bat
index 06e9776d862c77f79068b37cdbd509a68b22ad64..3e36dcf6002060f35747d06e050f707d57d0db6a 100644
--- a/vsprojects/vs2013/build_and_run_tests.bat
+++ b/vsprojects/vs2013/build_and_run_tests.bat
@@ -5,7 +5,7 @@
 
 @rem Build the library dependencies first
 MSBuild.exe gpr.vcxproj /p:Configuration=Debug
-MSBuild.exe grpc_test_util.vcxproj /p:Configuration=Debug
+MSBuild.exe gpr_test_util.vcxproj /p:Configuration=Debug
 
 mkdir test_bin