diff --git a/include/grpc/impl/codegen/time.h b/include/grpc/impl/codegen/time.h
index b40c2b260cccf5f1616e7df8c5f90e70d4abad70..4ed1c3cbd86b5c9769a61ae6aad1197c6363c72c 100644
--- a/include/grpc/impl/codegen/time.h
+++ b/include/grpc/impl/codegen/time.h
@@ -102,14 +102,16 @@ GPR_API gpr_timespec gpr_time_min(gpr_timespec a, gpr_timespec b);
 GPR_API gpr_timespec gpr_time_add(gpr_timespec a, gpr_timespec b);
 GPR_API gpr_timespec gpr_time_sub(gpr_timespec a, gpr_timespec b);
 
-/* Return a timespec representing a given number of time units. LONG_MIN is
-   interpreted as gpr_inf_past, and LONG_MAX as gpr_inf_future.  */
-GPR_API gpr_timespec gpr_time_from_micros(long x, gpr_clock_type clock_type);
-GPR_API gpr_timespec gpr_time_from_nanos(long x, gpr_clock_type clock_type);
-GPR_API gpr_timespec gpr_time_from_millis(long x, gpr_clock_type clock_type);
-GPR_API gpr_timespec gpr_time_from_seconds(long x, gpr_clock_type clock_type);
-GPR_API gpr_timespec gpr_time_from_minutes(long x, gpr_clock_type clock_type);
-GPR_API gpr_timespec gpr_time_from_hours(long x, gpr_clock_type clock_type);
+/* Return a timespec representing a given number of time units. INT64_MIN is
+   interpreted as gpr_inf_past, and INT64_MAX as gpr_inf_future.  */
+GPR_API gpr_timespec gpr_time_from_micros(int64_t x, gpr_clock_type clock_type);
+GPR_API gpr_timespec gpr_time_from_nanos(int64_t x, gpr_clock_type clock_type);
+GPR_API gpr_timespec gpr_time_from_millis(int64_t x, gpr_clock_type clock_type);
+GPR_API gpr_timespec
+gpr_time_from_seconds(int64_t x, gpr_clock_type clock_type);
+GPR_API gpr_timespec
+gpr_time_from_minutes(int64_t x, gpr_clock_type clock_type);
+GPR_API gpr_timespec gpr_time_from_hours(int64_t x, gpr_clock_type clock_type);
 
 GPR_API int32_t gpr_time_to_millis(gpr_timespec timespec);
 
diff --git a/src/core/iomgr/iocp_windows.c b/src/core/iomgr/iocp_windows.c
index 96b6f810248ac68cb38377539cd6223944e7c246..759340e00ef9365f4a3893a50ad7a0bb7e8b25c3 100644
--- a/src/core/iomgr/iocp_windows.c
+++ b/src/core/iomgr/iocp_windows.c
@@ -57,7 +57,7 @@ static HANDLE g_iocp;
 static DWORD deadline_to_millis_timeout(gpr_timespec deadline,
                                         gpr_timespec now) {
   gpr_timespec timeout;
-  static const int max_spin_polling_us = 10;
+  static const int64_t max_spin_polling_us = 10;
   if (gpr_time_cmp(deadline, gpr_inf_future(deadline.clock_type)) == 0) {
     return INFINITE;
   }
diff --git a/src/core/iomgr/pollset_posix.c b/src/core/iomgr/pollset_posix.c
index a8e2e22977753762bcd8cc05a2c371fffe0b16ec..19ee6650f006c25336d729964ae211b7820c372c 100644
--- a/src/core/iomgr/pollset_posix.c
+++ b/src/core/iomgr/pollset_posix.c
@@ -393,7 +393,7 @@ void grpc_pollset_shutdown(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
 int grpc_poll_deadline_to_millis_timeout(gpr_timespec deadline,
                                          gpr_timespec now) {
   gpr_timespec timeout;
-  static const int max_spin_polling_us = 10;
+  static const int64_t max_spin_polling_us = 10;
   if (gpr_time_cmp(deadline, gpr_inf_future(deadline.clock_type)) == 0) {
     return -1;
   }
diff --git a/src/core/support/stack_lockfree.c b/src/core/support/stack_lockfree.c
index 2c97ee18be1090691c7086d354383f838022489d..9daecd2e18a772c6a3fb7e820ffd01b866af72ca 100644
--- a/src/core/support/stack_lockfree.c
+++ b/src/core/support/stack_lockfree.c
@@ -99,7 +99,7 @@ gpr_stack_lockfree *gpr_stack_lockfree_create(size_t entries) {
 
   /* Point the head at reserved dummy entry */
   stack->head.contents.index = INVALID_ENTRY_INDEX;
-  /* Fill in the pad and aba_ctr to avoid confusing memcheck tools */
+/* Fill in the pad and aba_ctr to avoid confusing memcheck tools */
 #ifdef GPR_ARCH_64
   stack->head.contents.pad = 0;
 #endif
diff --git a/src/core/support/time.c b/src/core/support/time.c
index ac8c3bcde5b0da3597e4f6dcff9a5e6dd9186bcc..423d12ffc0fd052da61b22d1322ee9e54ca1d04b 100644
--- a/src/core/support/time.c
+++ b/src/core/support/time.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -83,12 +83,12 @@ gpr_timespec gpr_inf_past(gpr_clock_type type) {
 /* TODO(ctiller): consider merging _nanos, _micros, _millis into a single
    function for maintainability. Similarly for _seconds, _minutes, and _hours */
 
-gpr_timespec gpr_time_from_nanos(long ns, gpr_clock_type type) {
+gpr_timespec gpr_time_from_nanos(int64_t ns, gpr_clock_type type) {
   gpr_timespec result;
   result.clock_type = type;
-  if (ns == LONG_MAX) {
+  if (ns == INT64_MAX) {
     result = gpr_inf_future(type);
-  } else if (ns == LONG_MIN) {
+  } else if (ns == INT64_MIN) {
     result = gpr_inf_past(type);
   } else if (ns >= 0) {
     result.tv_sec = ns / GPR_NS_PER_SEC;
@@ -101,12 +101,12 @@ gpr_timespec gpr_time_from_nanos(long ns, gpr_clock_type type) {
   return result;
 }
 
-gpr_timespec gpr_time_from_micros(long us, gpr_clock_type type) {
+gpr_timespec gpr_time_from_micros(int64_t us, gpr_clock_type type) {
   gpr_timespec result;
   result.clock_type = type;
-  if (us == LONG_MAX) {
+  if (us == INT64_MAX) {
     result = gpr_inf_future(type);
-  } else if (us == LONG_MIN) {
+  } else if (us == INT64_MIN) {
     result = gpr_inf_past(type);
   } else if (us >= 0) {
     result.tv_sec = us / 1000000;
@@ -119,12 +119,12 @@ gpr_timespec gpr_time_from_micros(long us, gpr_clock_type type) {
   return result;
 }
 
-gpr_timespec gpr_time_from_millis(long ms, gpr_clock_type type) {
+gpr_timespec gpr_time_from_millis(int64_t ms, gpr_clock_type type) {
   gpr_timespec result;
   result.clock_type = type;
-  if (ms == LONG_MAX) {
+  if (ms == INT64_MAX) {
     result = gpr_inf_future(type);
-  } else if (ms == LONG_MIN) {
+  } else if (ms == INT64_MIN) {
     result = gpr_inf_past(type);
   } else if (ms >= 0) {
     result.tv_sec = ms / 1000;
@@ -137,12 +137,12 @@ gpr_timespec gpr_time_from_millis(long ms, gpr_clock_type type) {
   return result;
 }
 
-gpr_timespec gpr_time_from_seconds(long s, gpr_clock_type type) {
+gpr_timespec gpr_time_from_seconds(int64_t s, gpr_clock_type type) {
   gpr_timespec result;
   result.clock_type = type;
-  if (s == LONG_MAX) {
+  if (s == INT64_MAX) {
     result = gpr_inf_future(type);
-  } else if (s == LONG_MIN) {
+  } else if (s == INT64_MIN) {
     result = gpr_inf_past(type);
   } else {
     result.tv_sec = s;
@@ -151,12 +151,12 @@ gpr_timespec gpr_time_from_seconds(long s, gpr_clock_type type) {
   return result;
 }
 
-gpr_timespec gpr_time_from_minutes(long m, gpr_clock_type type) {
+gpr_timespec gpr_time_from_minutes(int64_t m, gpr_clock_type type) {
   gpr_timespec result;
   result.clock_type = type;
-  if (m >= LONG_MAX / 60) {
+  if (m >= INT64_MAX / 60) {
     result = gpr_inf_future(type);
-  } else if (m <= LONG_MIN / 60) {
+  } else if (m <= INT64_MIN / 60) {
     result = gpr_inf_past(type);
   } else {
     result.tv_sec = m * 60;
@@ -165,12 +165,12 @@ gpr_timespec gpr_time_from_minutes(long m, gpr_clock_type type) {
   return result;
 }
 
-gpr_timespec gpr_time_from_hours(long h, gpr_clock_type type) {
+gpr_timespec gpr_time_from_hours(int64_t h, gpr_clock_type type) {
   gpr_timespec result;
   result.clock_type = type;
-  if (h >= LONG_MAX / 3600) {
+  if (h >= INT64_MAX / 3600) {
     result = gpr_inf_future(type);
-  } else if (h <= LONG_MIN / 3600) {
+  } else if (h <= INT64_MIN / 3600) {
     result = gpr_inf_past(type);
   } else {
     result.tv_sec = h * 3600;
diff --git a/src/node/ext/timeval.cc b/src/node/ext/timeval.cc
index 64015e8412e59a2bf9607ae47ee21b0af9e7c470..c8f8534cfa7fd6abadfe8f1459cd7f9cc7c43f68 100644
--- a/src/node/ext/timeval.cc
+++ b/src/node/ext/timeval.cc
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -32,6 +32,7 @@
  */
 
 #include <limits>
+#include <cstdint>
 
 #include "grpc/grpc.h"
 #include "grpc/support/time.h"
@@ -46,7 +47,7 @@ gpr_timespec MillisecondsToTimespec(double millis) {
   } else if (millis == -std::numeric_limits<double>::infinity()) {
     return gpr_inf_past(GPR_CLOCK_REALTIME);
   } else {
-    return gpr_time_from_micros(static_cast<long>(millis * 1000),
+    return gpr_time_from_micros(static_cast<int64_t>(millis * 1000),
                                 GPR_CLOCK_REALTIME);
   }
 }
diff --git a/src/python/grpcio/grpc/_cython/_cygrpc/grpc.pxi b/src/python/grpcio/grpc/_cython/_cygrpc/grpc.pxi
index 9d6e0170269fe12febbbc75f3864897fd4eee64e..9c85e0ee1bd08d24d8a39bcd634769d14d38ed96 100644
--- a/src/python/grpcio/grpc/_cython/_cygrpc/grpc.pxi
+++ b/src/python/grpcio/grpc/_cython/_cygrpc/grpc.pxi
@@ -1,4 +1,4 @@
-# Copyright 2015, Google Inc.
+# Copyright 2015-2016, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
diff --git a/src/python/grpcio/grpc/_cython/_cygrpc/records.pyx.pxi b/src/python/grpcio/grpc/_cython/_cygrpc/records.pyx.pxi
index 9e14b967e0aa3dcd1e4fc422ab1b2989f59b7061..fa4ea99ea9e68e0e6ef965bb4ba1655ea0656529 100644
--- a/src/python/grpcio/grpc/_cython/_cygrpc/records.pyx.pxi
+++ b/src/python/grpcio/grpc/_cython/_cygrpc/records.pyx.pxi
@@ -1,4 +1,4 @@
-# Copyright 2015, Google Inc.
+# Copyright 2015-2016, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
diff --git a/src/python/grpcio/grpc/_cython/cygrpc.pyx b/src/python/grpcio/grpc/_cython/cygrpc.pyx
index 579bac7b8af7f03a43c4f828efb10326ac283767..b1836bf5be3ffb5647d96971d2a4de0f8156ffc5 100644
--- a/src/python/grpcio/grpc/_cython/cygrpc.pyx
+++ b/src/python/grpcio/grpc/_cython/cygrpc.pyx
@@ -1,4 +1,4 @@
-# Copyright 2015, Google Inc.
+# Copyright 2015-2016, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
diff --git a/src/python/grpcio/grpc/_cython/imports.generated.h b/src/python/grpcio/grpc/_cython/imports.generated.h
index f85d416db8fc28917d6d51ad0f1afd23e2fe8b72..6d0a6e06c0002fe42d899ab0665eb8c86dcd4144 100644
--- a/src/python/grpcio/grpc/_cython/imports.generated.h
+++ b/src/python/grpcio/grpc/_cython/imports.generated.h
@@ -655,22 +655,22 @@ extern gpr_time_add_type gpr_time_add_import;
 typedef gpr_timespec(*gpr_time_sub_type)(gpr_timespec a, gpr_timespec b);
 extern gpr_time_sub_type gpr_time_sub_import;
 #define gpr_time_sub gpr_time_sub_import
-typedef gpr_timespec(*gpr_time_from_micros_type)(long x, gpr_clock_type clock_type);
+typedef gpr_timespec(*gpr_time_from_micros_type)(int64_t x, gpr_clock_type clock_type);
 extern gpr_time_from_micros_type gpr_time_from_micros_import;
 #define gpr_time_from_micros gpr_time_from_micros_import
-typedef gpr_timespec(*gpr_time_from_nanos_type)(long x, gpr_clock_type clock_type);
+typedef gpr_timespec(*gpr_time_from_nanos_type)(int64_t x, gpr_clock_type clock_type);
 extern gpr_time_from_nanos_type gpr_time_from_nanos_import;
 #define gpr_time_from_nanos gpr_time_from_nanos_import
-typedef gpr_timespec(*gpr_time_from_millis_type)(long x, gpr_clock_type clock_type);
+typedef gpr_timespec(*gpr_time_from_millis_type)(int64_t x, gpr_clock_type clock_type);
 extern gpr_time_from_millis_type gpr_time_from_millis_import;
 #define gpr_time_from_millis gpr_time_from_millis_import
-typedef gpr_timespec(*gpr_time_from_seconds_type)(long x, gpr_clock_type clock_type);
+typedef gpr_timespec(*gpr_time_from_seconds_type)(int64_t x, gpr_clock_type clock_type);
 extern gpr_time_from_seconds_type gpr_time_from_seconds_import;
 #define gpr_time_from_seconds gpr_time_from_seconds_import
-typedef gpr_timespec(*gpr_time_from_minutes_type)(long x, gpr_clock_type clock_type);
+typedef gpr_timespec(*gpr_time_from_minutes_type)(int64_t x, gpr_clock_type clock_type);
 extern gpr_time_from_minutes_type gpr_time_from_minutes_import;
 #define gpr_time_from_minutes gpr_time_from_minutes_import
-typedef gpr_timespec(*gpr_time_from_hours_type)(long x, gpr_clock_type clock_type);
+typedef gpr_timespec(*gpr_time_from_hours_type)(int64_t x, gpr_clock_type clock_type);
 extern gpr_time_from_hours_type gpr_time_from_hours_import;
 #define gpr_time_from_hours gpr_time_from_hours_import
 typedef int32_t(*gpr_time_to_millis_type)(gpr_timespec timespec);
diff --git a/src/ruby/ext/grpc/rb_grpc_imports.generated.h b/src/ruby/ext/grpc/rb_grpc_imports.generated.h
index 45e9b475743f7809d88ff4cee515ff96e8cf2ae4..618ae5e7fcfe77ea8d16c6f223a10322719212bc 100644
--- a/src/ruby/ext/grpc/rb_grpc_imports.generated.h
+++ b/src/ruby/ext/grpc/rb_grpc_imports.generated.h
@@ -655,22 +655,22 @@ extern gpr_time_add_type gpr_time_add_import;
 typedef gpr_timespec(*gpr_time_sub_type)(gpr_timespec a, gpr_timespec b);
 extern gpr_time_sub_type gpr_time_sub_import;
 #define gpr_time_sub gpr_time_sub_import
-typedef gpr_timespec(*gpr_time_from_micros_type)(long x, gpr_clock_type clock_type);
+typedef gpr_timespec(*gpr_time_from_micros_type)(int64_t x, gpr_clock_type clock_type);
 extern gpr_time_from_micros_type gpr_time_from_micros_import;
 #define gpr_time_from_micros gpr_time_from_micros_import
-typedef gpr_timespec(*gpr_time_from_nanos_type)(long x, gpr_clock_type clock_type);
+typedef gpr_timespec(*gpr_time_from_nanos_type)(int64_t x, gpr_clock_type clock_type);
 extern gpr_time_from_nanos_type gpr_time_from_nanos_import;
 #define gpr_time_from_nanos gpr_time_from_nanos_import
-typedef gpr_timespec(*gpr_time_from_millis_type)(long x, gpr_clock_type clock_type);
+typedef gpr_timespec(*gpr_time_from_millis_type)(int64_t x, gpr_clock_type clock_type);
 extern gpr_time_from_millis_type gpr_time_from_millis_import;
 #define gpr_time_from_millis gpr_time_from_millis_import
-typedef gpr_timespec(*gpr_time_from_seconds_type)(long x, gpr_clock_type clock_type);
+typedef gpr_timespec(*gpr_time_from_seconds_type)(int64_t x, gpr_clock_type clock_type);
 extern gpr_time_from_seconds_type gpr_time_from_seconds_import;
 #define gpr_time_from_seconds gpr_time_from_seconds_import
-typedef gpr_timespec(*gpr_time_from_minutes_type)(long x, gpr_clock_type clock_type);
+typedef gpr_timespec(*gpr_time_from_minutes_type)(int64_t x, gpr_clock_type clock_type);
 extern gpr_time_from_minutes_type gpr_time_from_minutes_import;
 #define gpr_time_from_minutes gpr_time_from_minutes_import
-typedef gpr_timespec(*gpr_time_from_hours_type)(long x, gpr_clock_type clock_type);
+typedef gpr_timespec(*gpr_time_from_hours_type)(int64_t x, gpr_clock_type clock_type);
 extern gpr_time_from_hours_type gpr_time_from_hours_import;
 #define gpr_time_from_hours gpr_time_from_hours_import
 typedef int32_t(*gpr_time_to_millis_type)(gpr_timespec timespec);
diff --git a/test/core/statistics/census_log_tests.c b/test/core/statistics/census_log_tests.c
index aac20fd96a2ea87a821df4d57f9df26811d392cd..77cc57d4d63b75ea050fd08873d136e7a11a4c69 100644
--- a/test/core/statistics/census_log_tests.c
+++ b/test/core/statistics/census_log_tests.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -237,8 +237,8 @@ static void reader_thread(void *arg) {
   gpr_timespec interval;
   int counter = 0;
   printf("   Reader starting\n");
-  interval = gpr_time_from_micros(args->read_iteration_interval_in_msec * 1000,
-                                  GPR_TIMESPAN);
+  interval = gpr_time_from_micros(
+      (int64_t)args->read_iteration_interval_in_msec * 1000, GPR_TIMESPAN);
   gpr_mu_lock(args->mu);
   while (!args->stop_flag && records_read < args->total_records) {
     gpr_cv_wait(&args->stop, args->mu, interval);
diff --git a/test/core/support/sync_test.c b/test/core/support/sync_test.c
index 0149bc3afdeee54333804680a5de3246d85b6fb9..d311eb136a6a27b3bf78866e30dd5c3adfcff324 100644
--- a/test/core/support/sync_test.c
+++ b/test/core/support/sync_test.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -251,7 +251,7 @@ static void test(const char *name, void (*body)(void *m),
   gpr_timespec start = gpr_now(GPR_CLOCK_REALTIME);
   gpr_timespec time_taken;
   gpr_timespec deadline = gpr_time_add(
-      start, gpr_time_from_micros(timeout_s * 1000000, GPR_TIMESPAN));
+      start, gpr_time_from_micros((int64_t)timeout_s * 1000000, GPR_TIMESPAN));
   fprintf(stderr, "%s:", name);
   while (gpr_time_cmp(gpr_now(GPR_CLOCK_REALTIME), deadline) < 0) {
     iterations <<= 1;
diff --git a/test/core/support/time_test.c b/test/core/support/time_test.c
index fc26f94d29a1a774e554a772438c4a166e2c0e78..6cc3786df12be55abceb93f41eaf8681365ef6a9 100644
--- a/test/core/support/time_test.c
+++ b/test/core/support/time_test.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -125,15 +125,15 @@ static void test_values(void) {
   }
 
   /* Test possible overflow in conversion of -ve values. */
-  x = gpr_time_from_micros(-(LONG_MAX - 999997), GPR_TIMESPAN);
+  x = gpr_time_from_micros(-(INT64_MAX - 999997), GPR_TIMESPAN);
   GPR_ASSERT(x.tv_sec < 0);
   GPR_ASSERT(x.tv_nsec >= 0 && x.tv_nsec < GPR_NS_PER_SEC);
 
-  x = gpr_time_from_nanos(-(LONG_MAX - 999999997), GPR_TIMESPAN);
+  x = gpr_time_from_nanos(-(INT64_MAX - 999999997), GPR_TIMESPAN);
   GPR_ASSERT(x.tv_sec < 0);
   GPR_ASSERT(x.tv_nsec >= 0 && x.tv_nsec < GPR_NS_PER_SEC);
 
-  x = gpr_time_from_millis(-(LONG_MAX - 997), GPR_TIMESPAN);
+  x = gpr_time_from_millis(-(INT64_MAX - 997), GPR_TIMESPAN);
   GPR_ASSERT(x.tv_sec < 0);
   GPR_ASSERT(x.tv_nsec >= 0 && x.tv_nsec < GPR_NS_PER_SEC);
 
diff --git a/test/core/transport/chttp2/timeout_encoding_test.c b/test/core/transport/chttp2/timeout_encoding_test.c
index f0e8ec386fcf6518b5bdf1b1dc88c31d65f90138..483e79fb2536ccf162c506e4ec81a9deb52df329 100644
--- a/test/core/transport/chttp2/timeout_encoding_test.c
+++ b/test/core/transport/chttp2/timeout_encoding_test.c
@@ -93,7 +93,7 @@ static void assert_decodes_as(const char *buffer, gpr_timespec expected) {
 }
 
 void decode_suite(char ext,
-                  gpr_timespec (*answer)(long x, gpr_clock_type clock)) {
+                  gpr_timespec (*answer)(int64_t x, gpr_clock_type clock)) {
   long test_vals[] = {1,       12,       123,       1234,     12345,   123456,
                       1234567, 12345678, 123456789, 98765432, 9876543, 987654,
                       98765,   9876,     987,       98,       9};
diff --git a/test/core/util/test_config.h b/test/core/util/test_config.h
index 15b71747fb5963bff8f04f7f9e12e78b25f9583f..f6bb2e1f72a2317bca2acf0e18cbff00d04f4609 100644
--- a/test/core/util/test_config.h
+++ b/test/core/util/test_config.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -54,16 +54,16 @@ extern double g_fixture_slowdown_factor;
   (GRPC_TEST_SLOWDOWN_BUILD_FACTOR * GRPC_TEST_SLOWDOWN_MACHINE_FACTOR * \
    g_fixture_slowdown_factor)
 
-#define GRPC_TIMEOUT_SECONDS_TO_DEADLINE(x)                               \
-  gpr_time_add(                                                           \
-      gpr_now(GPR_CLOCK_MONOTONIC),                                       \
-      gpr_time_from_millis((long)(GRPC_TEST_SLOWDOWN_FACTOR * 1e3 * (x)), \
+#define GRPC_TIMEOUT_SECONDS_TO_DEADLINE(x)                                  \
+  gpr_time_add(                                                              \
+      gpr_now(GPR_CLOCK_MONOTONIC),                                          \
+      gpr_time_from_millis((int64_t)(GRPC_TEST_SLOWDOWN_FACTOR * 1e3 * (x)), \
                            GPR_TIMESPAN))
 
-#define GRPC_TIMEOUT_MILLIS_TO_DEADLINE(x)                                \
-  gpr_time_add(                                                           \
-      gpr_now(GPR_CLOCK_MONOTONIC),                                       \
-      gpr_time_from_micros((long)(GRPC_TEST_SLOWDOWN_FACTOR * 1e3 * (x)), \
+#define GRPC_TIMEOUT_MILLIS_TO_DEADLINE(x)                                   \
+  gpr_time_add(                                                              \
+      gpr_now(GPR_CLOCK_MONOTONIC),                                          \
+      gpr_time_from_micros((int64_t)(GRPC_TEST_SLOWDOWN_FACTOR * 1e3 * (x)), \
                            GPR_TIMESPAN))
 
 #ifndef GRPC_TEST_CUSTOM_PICK_PORT
diff --git a/test/cpp/qps/client_async.cc b/test/cpp/qps/client_async.cc
index 6b6294ba518b32361d91a4898dd2b5c7ee9d9752..f3f8f37051b0778016ac3a4eface434d13f646f0 100644
--- a/test/cpp/qps/client_async.cc
+++ b/test/cpp/qps/client_async.cc
@@ -96,8 +96,7 @@ class ClientRpcContextUnaryImpl : public ClientRpcContext {
       std::function<
           std::unique_ptr<grpc::ClientAsyncResponseReader<ResponseType>>(
               BenchmarkService::Stub*, grpc::ClientContext*, const RequestType&,
-              CompletionQueue*)>
-          start_req,
+              CompletionQueue*)> start_req,
       std::function<void(grpc::Status, ResponseType*)> on_done)
       : ClientRpcContext(channel_id),
         context_(),
@@ -143,8 +142,7 @@ class ClientRpcContextUnaryImpl : public ClientRpcContext {
   std::function<void(grpc::Status, ResponseType*)> callback_;
   std::function<std::unique_ptr<grpc::ClientAsyncResponseReader<ResponseType>>(
       BenchmarkService::Stub*, grpc::ClientContext*, const RequestType&,
-      CompletionQueue*)>
-      start_req_;
+      CompletionQueue*)> start_req_;
   grpc::Status status_;
   double start_;
   std::unique_ptr<grpc::ClientAsyncResponseReader<ResponseType>>
@@ -164,12 +162,11 @@ class AsyncClient : public ClientImpl<StubType, RequestType> {
   using ClientImpl<StubType, RequestType>::cores_;
   using ClientImpl<StubType, RequestType>::channels_;
   using ClientImpl<StubType, RequestType>::request_;
-  AsyncClient(
-      const ClientConfig& config,
-      std::function<ClientRpcContext*(int, StubType*, const RequestType&)>
-          setup_ctx,
-      std::function<std::unique_ptr<StubType>(std::shared_ptr<Channel>)>
-          create_stub)
+  AsyncClient(const ClientConfig& config,
+              std::function<ClientRpcContext*(int, StubType*,
+                                              const RequestType&)> setup_ctx,
+              std::function<std::unique_ptr<StubType>(std::shared_ptr<Channel>)>
+                  create_stub)
       : ClientImpl<StubType, RequestType>(config, create_stub),
         num_async_threads_(NumThreads(config)),
         channel_lock_(new std::mutex[config.client_channels()]),
@@ -411,8 +408,7 @@ class ClientRpcContextStreamingImpl : public ClientRpcContext {
       std::function<std::unique_ptr<
           grpc::ClientAsyncReaderWriter<RequestType, ResponseType>>(
           BenchmarkService::Stub*, grpc::ClientContext*, CompletionQueue*,
-          void*)>
-          start_req,
+          void*)> start_req,
       std::function<void(grpc::Status, ResponseType*)> on_done)
       : ClientRpcContext(channel_id),
         context_(),
@@ -464,10 +460,10 @@ class ClientRpcContextStreamingImpl : public ClientRpcContext {
   ResponseType response_;
   bool (ClientRpcContextStreamingImpl::*next_state_)(bool, Histogram*);
   std::function<void(grpc::Status, ResponseType*)> callback_;
-  std::function<std::unique_ptr<
-      grpc::ClientAsyncReaderWriter<RequestType, ResponseType>>(
-      BenchmarkService::Stub*, grpc::ClientContext*, CompletionQueue*, void*)>
-      start_req_;
+  std::function<
+      std::unique_ptr<grpc::ClientAsyncReaderWriter<RequestType, ResponseType>>(
+          BenchmarkService::Stub*, grpc::ClientContext*, CompletionQueue*,
+          void*)> start_req_;
   grpc::Status status_;
   double start_;
   std::unique_ptr<grpc::ClientAsyncReaderWriter<RequestType, ResponseType>>
@@ -511,8 +507,7 @@ class ClientRpcContextGenericStreamingImpl : public ClientRpcContext {
       int channel_id, grpc::GenericStub* stub, const ByteBuffer& req,
       std::function<std::unique_ptr<grpc::GenericClientAsyncReaderWriter>(
           grpc::GenericStub*, grpc::ClientContext*,
-          const grpc::string& method_name, CompletionQueue*, void*)>
-          start_req,
+          const grpc::string& method_name, CompletionQueue*, void*)> start_req,
       std::function<void(grpc::Status, ByteBuffer*)> on_done)
       : ClientRpcContext(channel_id),
         context_(),
@@ -569,8 +564,7 @@ class ClientRpcContextGenericStreamingImpl : public ClientRpcContext {
   std::function<void(grpc::Status, ByteBuffer*)> callback_;
   std::function<std::unique_ptr<grpc::GenericClientAsyncReaderWriter>(
       grpc::GenericStub*, grpc::ClientContext*, const grpc::string&,
-      CompletionQueue*, void*)>
-      start_req_;
+      CompletionQueue*, void*)> start_req_;
   grpc::Status status_;
   double start_;
   std::unique_ptr<grpc::GenericClientAsyncReaderWriter> stream_;
diff --git a/test/cpp/qps/driver.h b/test/cpp/qps/driver.h
index 4b2b400c0ce9ec3aa10e30ce0b47f83cbb478b48..3af61f73917f35b9bdf929b6cb0c7009bb1b09f5 100644
--- a/test/cpp/qps/driver.h
+++ b/test/cpp/qps/driver.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/test/cpp/util/time_test.cc b/test/cpp/util/time_test.cc
index 1e501dfd28877413fd5ff4274fd1c1c37067d2b8..48c6ce7697ca0b923bbd51fec6635790e530edcb 100644
--- a/test/cpp/util/time_test.cc
+++ b/test/cpp/util/time_test.cc
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -45,7 +45,7 @@ namespace {
 class TimeTest : public ::testing::Test {};
 
 TEST_F(TimeTest, AbsolutePointTest) {
-  long us = 10000000L;
+  int64_t us = 10000000L;
   gpr_timespec ts = gpr_time_from_micros(us, GPR_TIMESPAN);
   ts.clock_type = GPR_CLOCK_REALTIME;
   system_clock::time_point tp{microseconds(us)};
diff --git a/test/distrib/python/distribtest.py b/test/distrib/python/distribtest.py
index 428ffe2b34a296cf2eb437aa1954c128f01597aa..66c1f88796454353c2efd6a55d2fe7df44ea8188 100644
--- a/test/distrib/python/distribtest.py
+++ b/test/distrib/python/distribtest.py
@@ -1,3 +1,32 @@
+# Copyright 2015-2016, Google Inc.
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
 from grpc.beta import implementations
 
 # This code doesn't do much but makes sure the native extension is loaded