diff --git a/templates/tools/fuzzer/runners.template b/templates/tools/fuzzer/runners.template
index 26ac7c80dfa..287bb2acbf7 100644
--- a/templates/tools/fuzzer/runners.template
+++ b/templates/tools/fuzzer/runners.template
@@ -35,7 +35,7 @@ template: |
   # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   #
 
-  flags="-max_total_time=3600"
+  flags="-max_total_time=3600 -jobs=20 -workers=20"
   if [ "$config" == "asan-trace-cmp" ]
   then
     flags="-use_traces=1 $flags"
diff --git a/tools/fuzzer/runners/hpack_parser_fuzzer_test.sh b/tools/fuzzer/runners/hpack_parser_fuzzer_test.sh
index 366fe76ab3f..6f89e5250cd 100644
--- a/tools/fuzzer/runners/hpack_parser_fuzzer_test.sh
+++ b/tools/fuzzer/runners/hpack_parser_fuzzer_test.sh
@@ -29,7 +29,7 @@
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #
 
-flags="-max_total_time=3600"
+flags="-max_total_time=3600 -jobs=20 -workers=20"
 if [ "$config" == "asan-trace-cmp" ]
 then
   flags="-use_traces=1 $flags"
diff --git a/tools/fuzzer/runners/http_fuzzer_test.sh b/tools/fuzzer/runners/http_fuzzer_test.sh
index 00a420809c1..fb7120ddce0 100644
--- a/tools/fuzzer/runners/http_fuzzer_test.sh
+++ b/tools/fuzzer/runners/http_fuzzer_test.sh
@@ -29,7 +29,7 @@
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #
 
-flags="-max_total_time=3600"
+flags="-max_total_time=3600 -jobs=20 -workers=20"
 if [ "$config" == "asan-trace-cmp" ]
 then
   flags="-use_traces=1 $flags"
diff --git a/tools/fuzzer/runners/json_fuzzer_test.sh b/tools/fuzzer/runners/json_fuzzer_test.sh
index 1cd3d55d1bd..fc10c771937 100644
--- a/tools/fuzzer/runners/json_fuzzer_test.sh
+++ b/tools/fuzzer/runners/json_fuzzer_test.sh
@@ -29,7 +29,7 @@
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #
 
-flags="-max_total_time=3600"
+flags="-max_total_time=3600 -jobs=20 -workers=20"
 if [ "$config" == "asan-trace-cmp" ]
 then
   flags="-use_traces=1 $flags"
diff --git a/tools/fuzzer/runners/uri_fuzzer_test.sh b/tools/fuzzer/runners/uri_fuzzer_test.sh
index bac4fb844dc..fb2fa69e344 100644
--- a/tools/fuzzer/runners/uri_fuzzer_test.sh
+++ b/tools/fuzzer/runners/uri_fuzzer_test.sh
@@ -29,7 +29,7 @@
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #
 
-flags="-max_total_time=3600"
+flags="-max_total_time=3600 -jobs=20 -workers=20"
 if [ "$config" == "asan-trace-cmp" ]
 then
   flags="-use_traces=1 $flags"