diff --git a/src/core/lib/iomgr/tcp_windows.cc b/src/core/lib/iomgr/tcp_windows.cc
index 60d34ef897f..ae6b2b68e62 100644
--- a/src/core/lib/iomgr/tcp_windows.cc
+++ b/src/core/lib/iomgr/tcp_windows.cc
@@ -74,20 +74,6 @@ static grpc_error* set_dualstack(SOCKET sock) {
              : GRPC_WSA_ERROR(WSAGetLastError(), "setsockopt(IPV6_V6ONLY)");
 }
 
-static grpc_error* enable_loopback_fast_path(SOCKET sock) {
-  int status;
-  uint32_t param = 1;
-  DWORD ret;
-  status = WSAIoctl(sock, /*SIO_LOOPBACK_FAST_PATH==*/_WSAIOW(IOC_VENDOR, 16),
-                    &param, sizeof(param), NULL, 0, &ret, 0, 0);
-  if (status == SOCKET_ERROR) {
-    status = WSAGetLastError();
-  }
-  return status == 0 || status == WSAEOPNOTSUPP
-             ? GRPC_ERROR_NONE
-             : GRPC_WSA_ERROR(status, "WSAIoctl(SIO_LOOPBACK_FAST_PATH)");
-}
-
 static grpc_error* enable_socket_low_latency(SOCKET sock) {
   int status;
   BOOL param = TRUE;
@@ -106,8 +92,6 @@ grpc_error* grpc_tcp_prepare_socket(SOCKET sock) {
   if (err != GRPC_ERROR_NONE) return err;
   err = set_dualstack(sock);
   if (err != GRPC_ERROR_NONE) return err;
-  err = enable_loopback_fast_path(sock);
-  if (err != GRPC_ERROR_NONE) return err;
   err = enable_socket_low_latency(sock);
   if (err != GRPC_ERROR_NONE) return err;
   return GRPC_ERROR_NONE;
diff --git a/src/objective-c/!ProtoCompiler-gRPCPlugin.podspec b/src/objective-c/!ProtoCompiler-gRPCPlugin.podspec
index af876287038..88b8d2975d6 100644
--- a/src/objective-c/!ProtoCompiler-gRPCPlugin.podspec
+++ b/src/objective-c/!ProtoCompiler-gRPCPlugin.podspec
@@ -101,7 +101,7 @@ Pod::Spec.new do |s|
   s.preserve_paths = plugin
 
   # Restrict the protoc version to the one supported by this plugin.
-  s.dependency '!ProtoCompiler', '3.6.1'
+  s.dependency '!ProtoCompiler', '3.7.0'
   # For the Protobuf dependency not to complain:
   s.ios.deployment_target = '7.0'
   s.osx.deployment_target = '10.9'
diff --git a/src/objective-c/!ProtoCompiler.podspec b/src/objective-c/!ProtoCompiler.podspec
index 789265470c1..58d74be4d4e 100644
--- a/src/objective-c/!ProtoCompiler.podspec
+++ b/src/objective-c/!ProtoCompiler.podspec
@@ -36,7 +36,7 @@ Pod::Spec.new do |s|
   # exclamation mark ensures that other "regular" pods will be able to find it as it'll be installed
   # before them.
   s.name     = '!ProtoCompiler'
-  v = '3.6.1'
+  v = '3.7.0'
   s.version  = v
   s.summary  = 'The Protobuf Compiler (protoc) generates Objective-C files from .proto files'
   s.description = <<-DESC
diff --git a/src/php/bin/run_tests.sh b/src/php/bin/run_tests.sh
index 49fd84514c1..a78dd259e2f 100755
--- a/src/php/bin/run_tests.sh
+++ b/src/php/bin/run_tests.sh
@@ -22,16 +22,17 @@ cd src/php/bin
 source ./determine_extension_dir.sh
 # in some jenkins macos machine, somehow the PHP build script can't find libgrpc.dylib
 export DYLD_LIBRARY_PATH=$root/libs/$CONFIG
-php $extension_dir -d max_execution_time=300 $(which phpunit) -v --debug \
+$(which php) $extension_dir -d max_execution_time=300 $(which phpunit) -v --debug \
   --exclude-group persistent_list_bound_tests ../tests/unit_tests
 
-php $extension_dir -d max_execution_time=300 $(which phpunit) -v --debug \
+$(which php) $extension_dir -d max_execution_time=300 $(which phpunit) -v --debug \
   ../tests/unit_tests/PersistentChannelTests
 
 export ZEND_DONT_UNLOAD_MODULES=1
 export USE_ZEND_ALLOC=0
 # Detect whether valgrind is executable
 if [ -x "$(command -v valgrind)" ]; then
-  valgrind --error-exitcode=10 --leak-check=yes php $extension_dir -d max_execution_time=300 \
+  $(which valgrind) --error-exitcode=10 --leak-check=yes \
+    $(which php) $extension_dir -d max_execution_time=300 \
     ../tests/MemoryLeakTest/MemoryLeakTest.php
 fi
diff --git a/src/php/ext/grpc/php_grpc.c b/src/php/ext/grpc/php_grpc.c
index 3064563d03f..f6c2f85ed47 100644
--- a/src/php/ext/grpc/php_grpc.c
+++ b/src/php/ext/grpc/php_grpc.c
@@ -205,11 +205,15 @@ void register_fork_handlers() {
 
 void apply_ini_settings() {
   if (GRPC_G(enable_fork_support)) {
-    setenv("GRPC_ENABLE_FORK_SUPPORT", "1", 1 /* overwrite? */);
+    putenv("GRPC_ENABLE_FORK_SUPPORT=1");
   }
 
   if (GRPC_G(poll_strategy)) {
-    setenv("GRPC_POLL_STRATEGY", GRPC_G(poll_strategy), 1 /* overwrite? */);
+    char *poll_str = malloc(sizeof("GRPC_POLL_STRATEGY=") +
+                            strlen(GRPC_G(poll_strategy)));
+    strcpy(poll_str, "GRPC_POLL_STRATEGY=");
+    strcat(poll_str, GRPC_G(poll_strategy));
+    putenv(poll_str);
   }
 }
 
diff --git a/templates/src/objective-c/!ProtoCompiler-gRPCPlugin.podspec.template b/templates/src/objective-c/!ProtoCompiler-gRPCPlugin.podspec.template
index 5a416eb6471..741f9b7e54d 100644
--- a/templates/src/objective-c/!ProtoCompiler-gRPCPlugin.podspec.template
+++ b/templates/src/objective-c/!ProtoCompiler-gRPCPlugin.podspec.template
@@ -103,7 +103,7 @@
     s.preserve_paths = plugin
 
     # Restrict the protoc version to the one supported by this plugin.
-    s.dependency '!ProtoCompiler', '3.6.1'
+    s.dependency '!ProtoCompiler', '3.7.0'
     # For the Protobuf dependency not to complain:
     s.ios.deployment_target = '7.0'
     s.osx.deployment_target = '10.9'