Added a test to catch such things in future
diff --git a/build.yaml b/build.yaml
index e8620bf..6a43041 100644
--- a/build.yaml
+++ b/build.yaml
@@ -2277,6 +2277,21 @@
   - gpr_test_util
   - gpr
   uses_polling: false
+- name: ev_epollex_linux_test
+  cpu_cost: 3
+  build: test
+  language: c
+  src:
+  - test/core/iomgr/ev_epollex_linux_test.cc
+  deps:
+  - grpc_test_util
+  - grpc
+  - gpr_test_util
+  - gpr
+  exclude_iomgrs:
+  - uv
+  platforms:
+  - linux
 - name: ev_epollsig_linux_test
   cpu_cost: 3
   build: test