diff --git a/templates/tools/fuzzer/runners.template b/templates/tools/fuzzer/runners.template
index 20707163954733bb58239b32b467a710ecbf3172..99cd7376761bb55a978150a31f632dab4682967d 100644
--- a/templates/tools/fuzzer/runners.template
+++ b/templates/tools/fuzzer/runners.template
@@ -35,4 +35,4 @@ template: |
   # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   #
 
-  bins/$config/${selected.name} -max_total_time=60 fuzzer_output ${' '.join(selected.corpus_dirs)}
+  bins/$config/${selected.name} -max_total_time=3600 fuzzer_output ${' '.join(selected.corpus_dirs)}
diff --git a/tools/fuzzer/runners/hpack_parser_fuzzer_test.sh b/tools/fuzzer/runners/hpack_parser_fuzzer_test.sh
index 932b69e8ce75291b1f7b20be5fb3b95030aad028..d6315ec6264961c7046eb5be4698b1ebc8848095 100644
--- a/tools/fuzzer/runners/hpack_parser_fuzzer_test.sh
+++ b/tools/fuzzer/runners/hpack_parser_fuzzer_test.sh
@@ -29,4 +29,4 @@
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #
 
-bins/$config/hpack_parser_fuzzer_test -max_total_time=60 fuzzer_output test/core/transport/chttp2/hpack_parser_corpus
+bins/$config/hpack_parser_fuzzer_test -max_total_time=3600 fuzzer_output test/core/transport/chttp2/hpack_parser_corpus
diff --git a/tools/fuzzer/runners/http_fuzzer_test.sh b/tools/fuzzer/runners/http_fuzzer_test.sh
index afbc4f4c95584de84f6b4acf46e1f433f2ec8238..74dfe6ea23cb2765d3056a811185c13d40e2098a 100644
--- a/tools/fuzzer/runners/http_fuzzer_test.sh
+++ b/tools/fuzzer/runners/http_fuzzer_test.sh
@@ -29,4 +29,4 @@
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #
 
-bins/$config/http_fuzzer_test -max_total_time=60 fuzzer_output test/core/http/corpus
+bins/$config/http_fuzzer_test -max_total_time=3600 fuzzer_output test/core/http/corpus
diff --git a/tools/fuzzer/runners/json_fuzzer_test.sh b/tools/fuzzer/runners/json_fuzzer_test.sh
index 47e457232d97d76256895a930addd9340fad577b..2b0770a5053f509e05c227317a593aa3fa6c0ac9 100644
--- a/tools/fuzzer/runners/json_fuzzer_test.sh
+++ b/tools/fuzzer/runners/json_fuzzer_test.sh
@@ -29,4 +29,4 @@
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #
 
-bins/$config/json_fuzzer_test -max_total_time=60 fuzzer_output test/core/json/corpus
+bins/$config/json_fuzzer_test -max_total_time=3600 fuzzer_output test/core/json/corpus
diff --git a/tools/fuzzer/runners/uri_fuzzer_test.sh b/tools/fuzzer/runners/uri_fuzzer_test.sh
index 2da8d29d892940ab2863d99019755771dcd1a3ae..5225d18db22642f5030d0143cc2f27697d489f13 100644
--- a/tools/fuzzer/runners/uri_fuzzer_test.sh
+++ b/tools/fuzzer/runners/uri_fuzzer_test.sh
@@ -29,4 +29,4 @@
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #
 
-bins/$config/uri_fuzzer_test -max_total_time=60 fuzzer_output test/core/client_config/uri_corpus
+bins/$config/uri_fuzzer_test -max_total_time=3600 fuzzer_output test/core/client_config/uri_corpus