diff --git a/src/core/lib/iomgr/timer_manager.c b/src/core/lib/iomgr/timer_manager.c
index cd2a3a8c784..3d056ad18f7 100644
--- a/src/core/lib/iomgr/timer_manager.c
+++ b/src/core/lib/iomgr/timer_manager.c
@@ -189,6 +189,7 @@ static bool wait_until(grpc_exec_ctx *exec_ctx, grpc_millis next) {
 
     gpr_cv_wait(&g_cv_wait, &g_mu,
                 grpc_millis_to_timespec(next, GPR_CLOCK_REALTIME));
+    grpc_exec_ctx_invalidate_now(exec_ctx);
 
     if (GRPC_TRACER_ON(grpc_timer_check_trace)) {
       gpr_log(GPR_DEBUG, "wait ended: was_timed:%d kicked:%d",