diff --git a/BUILD b/BUILD
index f6c4338493aa8881d145b2a95702fe9ed54649ed..83c0f4f7dfcce44079fcfe0fbf2e0b9c8a6d15df 100644
--- a/BUILD
+++ b/BUILD
@@ -218,7 +218,6 @@ cc_library(
     "src/core/iomgr/time_averaged_stats.h",
     "src/core/iomgr/timer.h",
     "src/core/iomgr/timer_heap.h",
-    "src/core/iomgr/timer_internal.h",
     "src/core/iomgr/udp_server.h",
     "src/core/iomgr/wakeup_fd_pipe.h",
     "src/core/iomgr/wakeup_fd_posix.h",
@@ -538,7 +537,6 @@ cc_library(
     "src/core/iomgr/time_averaged_stats.h",
     "src/core/iomgr/timer.h",
     "src/core/iomgr/timer_heap.h",
-    "src/core/iomgr/timer_internal.h",
     "src/core/iomgr/udp_server.h",
     "src/core/iomgr/wakeup_fd_pipe.h",
     "src/core/iomgr/wakeup_fd_posix.h",
@@ -1483,7 +1481,6 @@ objc_library(
     "src/core/iomgr/time_averaged_stats.h",
     "src/core/iomgr/timer.h",
     "src/core/iomgr/timer_heap.h",
-    "src/core/iomgr/timer_internal.h",
     "src/core/iomgr/udp_server.h",
     "src/core/iomgr/wakeup_fd_pipe.h",
     "src/core/iomgr/wakeup_fd_posix.h",
diff --git a/build.yaml b/build.yaml
index 54f6e4c499b875e173e66ce94f438e5aa2b9f128..4d76bab1e11839737d6c088a0774cc01077e80b9 100644
--- a/build.yaml
+++ b/build.yaml
@@ -308,7 +308,6 @@ filegroups:
   - src/core/iomgr/time_averaged_stats.h
   - src/core/iomgr/timer.h
   - src/core/iomgr/timer_heap.h
-  - src/core/iomgr/timer_internal.h
   - src/core/iomgr/udp_server.h
   - src/core/iomgr/wakeup_fd_pipe.h
   - src/core/iomgr/wakeup_fd_posix.h
diff --git a/gRPC.podspec b/gRPC.podspec
index b40c80a0812579039cd6018bf47b3f634e05bc86..b0b25ec81909b046b883a03efce7ba41c6d8f31f 100644
--- a/gRPC.podspec
+++ b/gRPC.podspec
@@ -222,7 +222,6 @@ Pod::Spec.new do |s|
                       'src/core/iomgr/time_averaged_stats.h',
                       'src/core/iomgr/timer.h',
                       'src/core/iomgr/timer_heap.h',
-                      'src/core/iomgr/timer_internal.h',
                       'src/core/iomgr/udp_server.h',
                       'src/core/iomgr/wakeup_fd_pipe.h',
                       'src/core/iomgr/wakeup_fd_posix.h',
@@ -532,7 +531,6 @@ Pod::Spec.new do |s|
                               'src/core/iomgr/time_averaged_stats.h',
                               'src/core/iomgr/timer.h',
                               'src/core/iomgr/timer_heap.h',
-                              'src/core/iomgr/timer_internal.h',
                               'src/core/iomgr/udp_server.h',
                               'src/core/iomgr/wakeup_fd_pipe.h',
                               'src/core/iomgr/wakeup_fd_posix.h',
diff --git a/grpc.gemspec b/grpc.gemspec
index ae8cfaf7c905ba3f88e57287076a13688d84f3e4..0b6d293e6305044b6f1333d0b35e0b0531837e49 100755
--- a/grpc.gemspec
+++ b/grpc.gemspec
@@ -218,7 +218,6 @@ Gem::Specification.new do |s|
   s.files += %w( src/core/iomgr/time_averaged_stats.h )
   s.files += %w( src/core/iomgr/timer.h )
   s.files += %w( src/core/iomgr/timer_heap.h )
-  s.files += %w( src/core/iomgr/timer_internal.h )
   s.files += %w( src/core/iomgr/udp_server.h )
   s.files += %w( src/core/iomgr/wakeup_fd_pipe.h )
   s.files += %w( src/core/iomgr/wakeup_fd_posix.h )
diff --git a/package.json b/package.json
index d843020eaf3e09905504892939a24cbccec2d778..b765b9a93f2b63620035d531f2798b229cc04b4f 100644
--- a/package.json
+++ b/package.json
@@ -163,7 +163,6 @@
     "src/core/iomgr/time_averaged_stats.h",
     "src/core/iomgr/timer.h",
     "src/core/iomgr/timer_heap.h",
-    "src/core/iomgr/timer_internal.h",
     "src/core/iomgr/udp_server.h",
     "src/core/iomgr/wakeup_fd_pipe.h",
     "src/core/iomgr/wakeup_fd_posix.h",
diff --git a/src/core/iomgr/iocp_windows.c b/src/core/iomgr/iocp_windows.c
index 759340e00ef9365f4a3893a50ad7a0bb7e8b25c3..807729708ea7e1cc726dcd4fa8c0028a83b6627a 100644
--- a/src/core/iomgr/iocp_windows.c
+++ b/src/core/iomgr/iocp_windows.c
@@ -42,7 +42,7 @@
 #include <grpc/support/alloc.h>
 #include <grpc/support/thd.h>
 
-#include "src/core/iomgr/timer_internal.h"
+#include "src/core/iomgr/timer.h"
 #include "src/core/iomgr/iocp_windows.h"
 #include "src/core/iomgr/iomgr_internal.h"
 #include "src/core/iomgr/socket_windows.h"
diff --git a/src/core/iomgr/iomgr.c b/src/core/iomgr/iomgr.c
index 212ce5534dd9af5ea793c5361081771ee6731832..04580150f3a7117cf78c31fb873f5f5962cfa21f 100644
--- a/src/core/iomgr/iomgr.c
+++ b/src/core/iomgr/iomgr.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
@@ -43,7 +43,7 @@
 #include <grpc/support/thd.h>
 
 #include "src/core/iomgr/iomgr_internal.h"
-#include "src/core/iomgr/timer_internal.h"
+#include "src/core/iomgr/timer.h"
 #include "src/core/support/string.h"
 
 static gpr_mu g_mu;
diff --git a/src/core/iomgr/pollset_posix.c b/src/core/iomgr/pollset_posix.c
index 19ee6650f006c25336d729964ae211b7820c372c..1063727248a07033f11ad5f3918c3f7297555912 100644
--- a/src/core/iomgr/pollset_posix.c
+++ b/src/core/iomgr/pollset_posix.c
@@ -42,7 +42,6 @@
 #include <string.h>
 #include <unistd.h>
 
-#include "src/core/iomgr/timer_internal.h"
 #include "src/core/iomgr/fd_posix.h"
 #include "src/core/iomgr/iomgr_internal.h"
 #include "src/core/iomgr/socket_utils_posix.h"
@@ -274,16 +273,6 @@ void grpc_pollset_work(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
     grpc_exec_ctx_enqueue_list(exec_ctx, &pollset->idle_jobs, NULL);
     goto done;
   }
-  /* Check alarms - these are a global resource so we just ping
-     each time through on every pollset.
-     May update deadline to ensure timely wakeups.
-     TODO(ctiller): can this work be localized? */
-  if (grpc_timer_check(exec_ctx, now, &deadline)) {
-    GPR_TIMER_MARK("grpc_pollset_work.alarm_triggered", 0);
-    gpr_mu_unlock(&pollset->mu);
-    locked = 0;
-    goto done;
-  }
   /* If we're shutting down then we don't execute any extended work */
   if (pollset->shutting_down) {
     GPR_TIMER_MARK("grpc_pollset_work.shutting_down", 0);
diff --git a/src/core/iomgr/pollset_windows.c b/src/core/iomgr/pollset_windows.c
index 02c667836316a41f4bff83197653ca5c6f4ca653..35a956b27fd2b0ec7c4de6210180b59809f120cc 100644
--- a/src/core/iomgr/pollset_windows.c
+++ b/src/core/iomgr/pollset_windows.c
@@ -38,7 +38,6 @@
 #include <grpc/support/log.h>
 #include <grpc/support/thd.h>
 
-#include "src/core/iomgr/timer_internal.h"
 #include "src/core/iomgr/iomgr_internal.h"
 #include "src/core/iomgr/iocp_windows.h"
 #include "src/core/iomgr/pollset.h"
@@ -136,9 +135,6 @@ void grpc_pollset_work(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
   worker->kicked = 0;
   worker->pollset = pollset;
   gpr_cv_init(&worker->cv);
-  if (grpc_timer_check(exec_ctx, now, &deadline)) {
-    goto done;
-  }
   if (!pollset->kicked_without_pollers && !pollset->shutting_down) {
     if (g_active_poller == NULL) {
       grpc_pollset_worker *next_worker;
diff --git a/src/core/iomgr/timer.c b/src/core/iomgr/timer.c
index a33d8f63a05bb1bf687407468d714b23a6de5fb1..8379fffad02342a9df2f14801ec6d9ef4acab053 100644
--- a/src/core/iomgr/timer.c
+++ b/src/core/iomgr/timer.c
@@ -34,7 +34,6 @@
 #include "src/core/iomgr/timer.h"
 
 #include "src/core/iomgr/timer_heap.h"
-#include "src/core/iomgr/timer_internal.h"
 #include "src/core/iomgr/time_averaged_stats.h"
 #include <grpc/support/log.h>
 #include <grpc/support/sync.h>
@@ -336,8 +335,8 @@ static int run_some_expired_timers(grpc_exec_ctx *exec_ctx, gpr_timespec now,
   return (int)n;
 }
 
-int grpc_timer_check(grpc_exec_ctx *exec_ctx, gpr_timespec now,
-                     gpr_timespec *next) {
+bool grpc_timer_check(grpc_exec_ctx *exec_ctx, gpr_timespec now,
+                      gpr_timespec *next) {
   GPR_ASSERT(now.clock_type == g_clock_type);
   return run_some_expired_timers(
       exec_ctx, now, next,
diff --git a/src/core/iomgr/timer.h b/src/core/iomgr/timer.h
index 720c9d5ab9444f886b34ed72bdff786faea7f8f3..9ad1e92f42e4cc16ee2404b850f65953d7b7a609 100644
--- a/src/core/iomgr/timer.h
+++ b/src/core/iomgr/timer.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
@@ -86,4 +86,24 @@ void grpc_timer_init(grpc_exec_ctx *exec_ctx, grpc_timer *timer,
    Requires:  cancel() must happen after add() on a given timer */
 void grpc_timer_cancel(grpc_exec_ctx *exec_ctx, grpc_timer *timer);
 
+/* iomgr internal api for dealing with timers */
+
+/* Check for timers to be run, and run them.
+   Return true if timer callbacks were executed.
+   Drops drop_mu if it is non-null before executing callbacks.
+   If next is non-null, TRY to update *next with the next running timer
+   IF that timer occurs before *next current value.
+   *next is never guaranteed to be updated on any given execution; however,
+   with high probability at least one thread in the system will see an update
+   at any time slice. */
+
+bool grpc_timer_check(grpc_exec_ctx *exec_ctx, gpr_timespec now,
+                      gpr_timespec *next);
+void grpc_timer_list_init(gpr_timespec now);
+void grpc_timer_list_shutdown(grpc_exec_ctx *exec_ctx);
+
+/* the following must be implemented by each iomgr implementation */
+
+void grpc_kick_poller(void);
+
 #endif /* GRPC_INTERNAL_CORE_IOMGR_TIMER_H */
diff --git a/src/core/iomgr/timer_internal.h b/src/core/iomgr/timer_internal.h
deleted file mode 100644
index f182e737646276dae0661b59b5b1e984e165c9bc..0000000000000000000000000000000000000000
--- a/src/core/iomgr/timer_internal.h
+++ /dev/null
@@ -1,61 +0,0 @@
-/*
- *
- * Copyright 2015, 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.
- *
- */
-
-#ifndef GRPC_INTERNAL_CORE_IOMGR_TIMER_INTERNAL_H
-#define GRPC_INTERNAL_CORE_IOMGR_TIMER_INTERNAL_H
-
-#include "src/core/iomgr/exec_ctx.h"
-#include <grpc/support/sync.h>
-#include <grpc/support/time.h>
-
-/* iomgr internal api for dealing with timers */
-
-/* Check for timers to be run, and run them.
-   Return non zero if timer callbacks were executed.
-   Drops drop_mu if it is non-null before executing callbacks.
-   If next is non-null, TRY to update *next with the next running timer
-   IF that timer occurs before *next current value.
-   *next is never guaranteed to be updated on any given execution; however,
-   with high probability at least one thread in the system will see an update
-   at any time slice. */
-
-int grpc_timer_check(grpc_exec_ctx* exec_ctx, gpr_timespec now,
-                     gpr_timespec* next);
-void grpc_timer_list_init(gpr_timespec now);
-void grpc_timer_list_shutdown(grpc_exec_ctx* exec_ctx);
-
-/* the following must be implemented by each iomgr implementation */
-
-void grpc_kick_poller(void);
-
-#endif /* GRPC_INTERNAL_CORE_IOMGR_TIMER_INTERNAL_H */
diff --git a/src/core/surface/completion_queue.c b/src/core/surface/completion_queue.c
index 75298eb795c4fb9d9d995ad6a4b43bb9f2b86ffc..0a80680f02e3ba83d4bcfb0c141c58bee1db847f 100644
--- a/src/core/surface/completion_queue.c
+++ b/src/core/surface/completion_queue.c
@@ -323,7 +323,20 @@ grpc_event grpc_completion_queue_next(grpc_completion_queue *cc,
       break;
     }
     first_loop = 0;
-    grpc_pollset_work(&exec_ctx, &cc->pollset, &worker, now, deadline);
+    /* Check alarms - these are a global resource so we just ping
+       each time through on every pollset.
+       May update deadline to ensure timely wakeups.
+       TODO(ctiller): can this work be localized? */
+    gpr_timespec iteration_deadline = deadline;
+    if (grpc_timer_check(&exec_ctx, now, &iteration_deadline)) {
+      GPR_TIMER_MARK("alarm_triggered", 0);
+      gpr_mu_unlock(GRPC_POLLSET_MU(&cc->pollset));
+      grpc_exec_ctx_flush(&exec_ctx);
+      gpr_mu_lock(GRPC_POLLSET_MU(&cc->pollset));
+    } else {
+      grpc_pollset_work(&exec_ctx, &cc->pollset, &worker, now,
+                        iteration_deadline);
+    }
   }
   GRPC_SURFACE_TRACE_RETURNED_EVENT(cc, &ret);
   GRPC_CQ_INTERNAL_UNREF(cc, "next");
@@ -427,7 +440,20 @@ grpc_event grpc_completion_queue_pluck(grpc_completion_queue *cc, void *tag,
       break;
     }
     first_loop = 0;
-    grpc_pollset_work(&exec_ctx, &cc->pollset, &worker, now, deadline);
+    /* Check alarms - these are a global resource so we just ping
+       each time through on every pollset.
+       May update deadline to ensure timely wakeups.
+       TODO(ctiller): can this work be localized? */
+    gpr_timespec iteration_deadline = deadline;
+    if (grpc_timer_check(&exec_ctx, now, &iteration_deadline)) {
+      GPR_TIMER_MARK("alarm_triggered", 0);
+      gpr_mu_unlock(GRPC_POLLSET_MU(&cc->pollset));
+      grpc_exec_ctx_flush(&exec_ctx);
+      gpr_mu_lock(GRPC_POLLSET_MU(&cc->pollset));
+    } else {
+      grpc_pollset_work(&exec_ctx, &cc->pollset, &worker, now,
+                        iteration_deadline);
+    }
     del_plucker(cc, tag, &worker);
   }
 done:
diff --git a/test/core/iomgr/tcp_client_posix_test.c b/test/core/iomgr/tcp_client_posix_test.c
index 9725d8a3b6411de5798efb0ee95d4fb24584f63f..b57478059f016878f6b6afd26b780db4ccdc27fa 100644
--- a/test/core/iomgr/tcp_client_posix_test.c
+++ b/test/core/iomgr/tcp_client_posix_test.c
@@ -45,6 +45,7 @@
 
 #include "src/core/iomgr/iomgr.h"
 #include "src/core/iomgr/socket_utils_posix.h"
+#include "src/core/iomgr/timer.h"
 #include "test/core/util/test_config.h"
 
 static grpc_pollset_set g_pollset_set;
@@ -125,11 +126,13 @@ void test_succeeds(void) {
                       gpr_now(GPR_CLOCK_MONOTONIC),
                       GRPC_TIMEOUT_SECONDS_TO_DEADLINE(5));
     gpr_mu_unlock(GRPC_POLLSET_MU(&g_pollset));
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_exec_ctx_flush(&exec_ctx);
     gpr_mu_lock(GRPC_POLLSET_MU(&g_pollset));
   }
 
   gpr_mu_unlock(GRPC_POLLSET_MU(&g_pollset));
+
+  grpc_exec_ctx_finish(&exec_ctx);
 }
 
 void test_fails(void) {
@@ -159,14 +162,18 @@ void test_fails(void) {
   /* wait for the connection callback to finish */
   while (g_connections_complete == connections_complete_before) {
     grpc_pollset_worker worker;
-    grpc_pollset_work(&exec_ctx, &g_pollset, &worker,
-                      gpr_now(GPR_CLOCK_MONOTONIC), test_deadline());
+    gpr_timespec now = gpr_now(GPR_CLOCK_MONOTONIC);
+    gpr_timespec polling_deadline = test_deadline();
+    if (!grpc_timer_check(&exec_ctx, now, &polling_deadline)) {
+      grpc_pollset_work(&exec_ctx, &g_pollset, &worker, now, polling_deadline);
+    }
     gpr_mu_unlock(GRPC_POLLSET_MU(&g_pollset));
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_exec_ctx_flush(&exec_ctx);
     gpr_mu_lock(GRPC_POLLSET_MU(&g_pollset));
   }
 
   gpr_mu_unlock(GRPC_POLLSET_MU(&g_pollset));
+  grpc_exec_ctx_finish(&exec_ctx);
 }
 
 void test_times_out(void) {
@@ -243,15 +250,18 @@ void test_times_out(void) {
       GPR_ASSERT(g_connections_complete ==
                  connections_complete_before + is_after_deadline);
     }
-    grpc_pollset_work(&exec_ctx, &g_pollset, &worker,
-                      gpr_now(GPR_CLOCK_MONOTONIC),
-                      GRPC_TIMEOUT_MILLIS_TO_DEADLINE(10));
+    gpr_timespec polling_deadline = GRPC_TIMEOUT_MILLIS_TO_DEADLINE(10);
+    if (!grpc_timer_check(&exec_ctx, now, &polling_deadline)) {
+      grpc_pollset_work(&exec_ctx, &g_pollset, &worker, now, polling_deadline);
+    }
     gpr_mu_unlock(GRPC_POLLSET_MU(&g_pollset));
-    grpc_exec_ctx_finish(&exec_ctx);
+    grpc_exec_ctx_flush(&exec_ctx);
     gpr_mu_lock(GRPC_POLLSET_MU(&g_pollset));
   }
   gpr_mu_unlock(GRPC_POLLSET_MU(&g_pollset));
 
+  grpc_exec_ctx_finish(&exec_ctx);
+
   close(svr_fd);
   for (i = 0; i < NUM_CLIENT_CONNECTS; ++i) {
     close(client_fd[i]);
diff --git a/test/core/iomgr/timer_list_test.c b/test/core/iomgr/timer_list_test.c
index 15de87c5a1a4452ea57eb98350e8033f4df42ba4..7a21fdd5c1084bb6c69475b07624974401589256 100644
--- a/test/core/iomgr/timer_list_test.c
+++ b/test/core/iomgr/timer_list_test.c
@@ -35,7 +35,6 @@
 
 #include <string.h>
 
-#include "src/core/iomgr/timer_internal.h"
 #include <grpc/support/log.h>
 #include "test/core/util/test_config.h"
 
@@ -72,20 +71,19 @@ static void add_test(void) {
   }
 
   /* collect timers.  Only the first batch should be ready. */
-  GPR_ASSERT(10 == grpc_timer_check(&exec_ctx,
-                                    gpr_time_add(start, gpr_time_from_millis(
-                                                            500, GPR_TIMESPAN)),
-                                    NULL));
+  GPR_ASSERT(grpc_timer_check(
+      &exec_ctx, gpr_time_add(start, gpr_time_from_millis(500, GPR_TIMESPAN)),
+      NULL));
   grpc_exec_ctx_finish(&exec_ctx);
   for (i = 0; i < 20; i++) {
     GPR_ASSERT(cb_called[i][1] == (i < 10));
     GPR_ASSERT(cb_called[i][0] == 0);
   }
 
-  GPR_ASSERT(0 == grpc_timer_check(&exec_ctx,
-                                   gpr_time_add(start, gpr_time_from_millis(
-                                                           600, GPR_TIMESPAN)),
-                                   NULL));
+  GPR_ASSERT(!grpc_timer_check(
+                 &exec_ctx,
+                 gpr_time_add(start, gpr_time_from_millis(600, GPR_TIMESPAN)),
+                 NULL));
   grpc_exec_ctx_finish(&exec_ctx);
   for (i = 0; i < 30; i++) {
     GPR_ASSERT(cb_called[i][1] == (i < 10));
@@ -93,20 +91,19 @@ static void add_test(void) {
   }
 
   /* collect the rest of the timers */
-  GPR_ASSERT(10 == grpc_timer_check(
-                       &exec_ctx, gpr_time_add(start, gpr_time_from_millis(
-                                                          1500, GPR_TIMESPAN)),
-                       NULL));
+  GPR_ASSERT(grpc_timer_check(
+      &exec_ctx, gpr_time_add(start, gpr_time_from_millis(1500, GPR_TIMESPAN)),
+      NULL));
   grpc_exec_ctx_finish(&exec_ctx);
   for (i = 0; i < 30; i++) {
     GPR_ASSERT(cb_called[i][1] == (i < 20));
     GPR_ASSERT(cb_called[i][0] == 0);
   }
 
-  GPR_ASSERT(0 == grpc_timer_check(&exec_ctx,
-                                   gpr_time_add(start, gpr_time_from_millis(
-                                                           1600, GPR_TIMESPAN)),
-                                   NULL));
+  GPR_ASSERT(!grpc_timer_check(
+                 &exec_ctx,
+                 gpr_time_add(start, gpr_time_from_millis(1600, GPR_TIMESPAN)),
+                 NULL));
   for (i = 0; i < 30; i++) {
     GPR_ASSERT(cb_called[i][1] == (i < 20));
     GPR_ASSERT(cb_called[i][0] == 0);
diff --git a/tools/doxygen/Doxyfile.core.internal b/tools/doxygen/Doxyfile.core.internal
index b48901e910a7fdf752ea508154670ee8fe879bde..1f9b9ecc186747ebe9572aafe0a05be147510eef 100644
--- a/tools/doxygen/Doxyfile.core.internal
+++ b/tools/doxygen/Doxyfile.core.internal
@@ -837,7 +837,6 @@ src/core/iomgr/tcp_windows.h \
 src/core/iomgr/time_averaged_stats.h \
 src/core/iomgr/timer.h \
 src/core/iomgr/timer_heap.h \
-src/core/iomgr/timer_internal.h \
 src/core/iomgr/udp_server.h \
 src/core/iomgr/wakeup_fd_pipe.h \
 src/core/iomgr/wakeup_fd_posix.h \
diff --git a/tools/run_tests/sources_and_headers.json b/tools/run_tests/sources_and_headers.json
index b22a5a135f83cf64f14ae4e7dc44fa3b5aa6861d..e44a7bc79e6e20e46674ff37258e6a0261d72cd8 100644
--- a/tools/run_tests/sources_and_headers.json
+++ b/tools/run_tests/sources_and_headers.json
@@ -3048,7 +3048,6 @@
       "src/core/iomgr/time_averaged_stats.h", 
       "src/core/iomgr/timer.h", 
       "src/core/iomgr/timer_heap.h", 
-      "src/core/iomgr/timer_internal.h", 
       "src/core/iomgr/udp_server.h", 
       "src/core/iomgr/wakeup_fd_pipe.h", 
       "src/core/iomgr/wakeup_fd_posix.h", 
@@ -3271,7 +3270,6 @@
       "src/core/iomgr/timer.h", 
       "src/core/iomgr/timer_heap.c", 
       "src/core/iomgr/timer_heap.h", 
-      "src/core/iomgr/timer_internal.h", 
       "src/core/iomgr/udp_server.c", 
       "src/core/iomgr/udp_server.h", 
       "src/core/iomgr/wakeup_fd_eventfd.c", 
@@ -3589,7 +3587,6 @@
       "src/core/iomgr/time_averaged_stats.h", 
       "src/core/iomgr/timer.h", 
       "src/core/iomgr/timer_heap.h", 
-      "src/core/iomgr/timer_internal.h", 
       "src/core/iomgr/udp_server.h", 
       "src/core/iomgr/wakeup_fd_pipe.h", 
       "src/core/iomgr/wakeup_fd_posix.h", 
@@ -3796,7 +3793,6 @@
       "src/core/iomgr/timer.h", 
       "src/core/iomgr/timer_heap.c", 
       "src/core/iomgr/timer_heap.h", 
-      "src/core/iomgr/timer_internal.h", 
       "src/core/iomgr/udp_server.c", 
       "src/core/iomgr/udp_server.h", 
       "src/core/iomgr/wakeup_fd_eventfd.c", 
diff --git a/vsprojects/vcxproj/grpc/grpc.vcxproj b/vsprojects/vcxproj/grpc/grpc.vcxproj
index ebab196fcbf8b37125b06624383d6ccd7cca7c87..c8e73ef633966f609f5b5c6075b76d8c78bc9471 100644
--- a/vsprojects/vcxproj/grpc/grpc.vcxproj
+++ b/vsprojects/vcxproj/grpc/grpc.vcxproj
@@ -346,7 +346,6 @@
     <ClInclude Include="$(SolutionDir)\..\src\core\iomgr\time_averaged_stats.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\iomgr\timer.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\iomgr\timer_heap.h" />
-    <ClInclude Include="$(SolutionDir)\..\src\core\iomgr\timer_internal.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\iomgr\udp_server.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\iomgr\wakeup_fd_pipe.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\iomgr\wakeup_fd_posix.h" />
diff --git a/vsprojects/vcxproj/grpc/grpc.vcxproj.filters b/vsprojects/vcxproj/grpc/grpc.vcxproj.filters
index 68fc952fd624c3ed377e8fa787aba30966d54bda..6c37894a4eed996d42162a82ff6b132fa432281c 100644
--- a/vsprojects/vcxproj/grpc/grpc.vcxproj.filters
+++ b/vsprojects/vcxproj/grpc/grpc.vcxproj.filters
@@ -701,9 +701,6 @@
     <ClInclude Include="$(SolutionDir)\..\src\core\iomgr\timer_heap.h">
       <Filter>src\core\iomgr</Filter>
     </ClInclude>
-    <ClInclude Include="$(SolutionDir)\..\src\core\iomgr\timer_internal.h">
-      <Filter>src\core\iomgr</Filter>
-    </ClInclude>
     <ClInclude Include="$(SolutionDir)\..\src\core\iomgr\udp_server.h">
       <Filter>src\core\iomgr</Filter>
     </ClInclude>
diff --git a/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj b/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj
index 5daa7900f8ff3112c3de15cc66dbea942e5df82f..92de26ce8b4fe14ce27db8aa578749358435565e 100644
--- a/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj
+++ b/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj
@@ -336,7 +336,6 @@
     <ClInclude Include="$(SolutionDir)\..\src\core\iomgr\time_averaged_stats.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\iomgr\timer.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\iomgr\timer_heap.h" />
-    <ClInclude Include="$(SolutionDir)\..\src\core\iomgr\timer_internal.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\iomgr\udp_server.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\iomgr\wakeup_fd_pipe.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\iomgr\wakeup_fd_posix.h" />
diff --git a/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj.filters b/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj.filters
index 68f136398bd25c97af4f113585288fe143adaab3..75600a1d59941489c2dfda5f9189c8f9739d1ad4 100644
--- a/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj.filters
+++ b/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj.filters
@@ -638,9 +638,6 @@
     <ClInclude Include="$(SolutionDir)\..\src\core\iomgr\timer_heap.h">
       <Filter>src\core\iomgr</Filter>
     </ClInclude>
-    <ClInclude Include="$(SolutionDir)\..\src\core\iomgr\timer_internal.h">
-      <Filter>src\core\iomgr</Filter>
-    </ClInclude>
     <ClInclude Include="$(SolutionDir)\..\src\core\iomgr\udp_server.h">
       <Filter>src\core\iomgr</Filter>
     </ClInclude>