diff --git a/tools/internal_ci/linux/grpc_fuzzer_api.sh b/tools/internal_ci/linux/grpc_fuzzer_api.sh
index b1f792e7657bf7fb8044b60fb8010c368662f6cb..edf884338fc0ca7a1256f8ca4392e0bead623996 100755
--- a/tools/internal_ci/linux/grpc_fuzzer_api.sh
+++ b/tools/internal_ci/linux/grpc_fuzzer_api.sh
@@ -38,4 +38,4 @@ git submodule update --init
 # download fuzzer docker image from dockerhub
 export DOCKERHUB_ORGANIZATION=grpctesting
 # runtime 23 * 60 mins
-config=asan-trace-cmp runtime=86400 tools/jenkins/run_fuzzer.sh api_fuzzer
+config=asan-trace-cmp runtime=82800 tools/jenkins/run_fuzzer.sh api_fuzzer
diff --git a/tools/internal_ci/linux/grpc_fuzzer_hpack_parser.sh b/tools/internal_ci/linux/grpc_fuzzer_hpack_parser.sh
index 40179aa5470ff5d2e518ae4adf74d859902ff0c8..43933e6d82e1ba461ab920fb2fed051ed33ea1e9 100755
--- a/tools/internal_ci/linux/grpc_fuzzer_hpack_parser.sh
+++ b/tools/internal_ci/linux/grpc_fuzzer_hpack_parser.sh
@@ -37,6 +37,5 @@ git submodule update --init
 
 # download fuzzer docker image from dockerhub
 export DOCKERHUB_ORGANIZATION=grpctesting
-# runtime 23 * 60 mins
 config=asan-trace-cmp tools/jenkins/run_fuzzer.sh hpack_parser_fuzzer_test
 
diff --git a/tools/internal_ci/linux/grpc_fuzzer_http_request.sh b/tools/internal_ci/linux/grpc_fuzzer_http_request.sh
index 6dac4ed9abbd4267b9b39f33ea44bf99d6428131..ef975d327a00e7ab66b84b5fa9ccf288036dc0d2 100755
--- a/tools/internal_ci/linux/grpc_fuzzer_http_request.sh
+++ b/tools/internal_ci/linux/grpc_fuzzer_http_request.sh
@@ -37,6 +37,5 @@ git submodule update --init
 
 # download fuzzer docker image from dockerhub
 export DOCKERHUB_ORGANIZATION=grpctesting
-# runtime 23 * 60 mins
 config=asan-trace-cmp tools/jenkins/run_fuzzer.sh http_request_fuzzer_test
 
diff --git a/tools/internal_ci/linux/grpc_fuzzer_json.sh b/tools/internal_ci/linux/grpc_fuzzer_json.sh
index b002ecb26258e82885c6a7aecb470146935d4cde..1e64a026b689b211b55ab5a958fbd4f37d4f04f0 100755
--- a/tools/internal_ci/linux/grpc_fuzzer_json.sh
+++ b/tools/internal_ci/linux/grpc_fuzzer_json.sh
@@ -37,6 +37,5 @@ git submodule update --init
 
 # download fuzzer docker image from dockerhub
 export DOCKERHUB_ORGANIZATION=grpctesting
-# runtime 23 * 60 mins
 config=asan-trace-cmp tools/jenkins/run_fuzzer.sh json_fuzzer_test
 
diff --git a/tools/internal_ci/linux/grpc_fuzzer_nanopb_response.sh b/tools/internal_ci/linux/grpc_fuzzer_nanopb_response.sh
index 51a8eb58bbfcceae947911f9b3c0a1caea6c5167..6e7f4b7f291bb2ff4ba7db293d968f0af6e67a4e 100755
--- a/tools/internal_ci/linux/grpc_fuzzer_nanopb_response.sh
+++ b/tools/internal_ci/linux/grpc_fuzzer_nanopb_response.sh
@@ -37,5 +37,4 @@ git submodule update --init
 
 # download fuzzer docker image from dockerhub
 export DOCKERHUB_ORGANIZATION=grpctesting
-# runtime 23 * 60 mins
 config=asan-trace-cmp tools/jenkins/run_fuzzer.sh nanopb_fuzzer_response_test
diff --git a/tools/internal_ci/linux/grpc_fuzzer_server.sh b/tools/internal_ci/linux/grpc_fuzzer_server.sh
index b6648db34d11b9c96abf854c33584238cd4e53ef..82b24b0f20d733c028443d4544f1a6815e225394 100755
--- a/tools/internal_ci/linux/grpc_fuzzer_server.sh
+++ b/tools/internal_ci/linux/grpc_fuzzer_server.sh
@@ -38,4 +38,4 @@ git submodule update --init
 # download fuzzer docker image from dockerhub
 export DOCKERHUB_ORGANIZATION=grpctesting
 # runtime 23 * 60 mins
-config=asan-trace-cmp runtime=86400 tools/jenkins/run_fuzzer.sh server_fuzzer
+config=asan-trace-cmp runtime=82800 tools/jenkins/run_fuzzer.sh server_fuzzer
diff --git a/tools/internal_ci/linux/grpc_fuzzer_uri.sh b/tools/internal_ci/linux/grpc_fuzzer_uri.sh
index e3e46515e27bdfd2c43a42582487fc56e5863898..67039f38807ebc992edb4f4d6ba15bc77dfa6620 100755
--- a/tools/internal_ci/linux/grpc_fuzzer_uri.sh
+++ b/tools/internal_ci/linux/grpc_fuzzer_uri.sh
@@ -37,5 +37,4 @@ git submodule update --init
 
 # download fuzzer docker image from dockerhub
 export DOCKERHUB_ORGANIZATION=grpctesting
-# runtime 23 * 60 mins
 config=asan-trace-cmp tools/jenkins/run_fuzzer.sh uri_fuzzer_test
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"