diff --git a/tools/internal_ci/linux/grpc_master.sh b/tools/internal_ci/linux/grpc_master.sh
index 397e1bd713c1bf15dc7e8fd65fd8a605b1ce6d3c..d01d6375e9a7fff8d8c571dcf252b5935cef2526 100755
--- a/tools/internal_ci/linux/grpc_master.sh
+++ b/tools/internal_ci/linux/grpc_master.sh
@@ -40,6 +40,9 @@ gcc --version || true
 clang --version || true
 docker --version || true
 
+# Need to increase open files limit for c tests
+ulimit -n 2000
+
 git submodule update --init
 
 tools/run_tests/run_tests.py -l c -t -x sponge_log.xml || FAILED="true"