diff --git a/.kokoro/python3.6/periodic.cfg b/.kokoro/python3.6/periodic.cfg
index 90879b0bec7e..c91164fa3b7c 100644
--- a/.kokoro/python3.6/periodic.cfg
+++ b/.kokoro/python3.6/periodic.cfg
@@ -14,6 +14,8 @@
 
 # Format: //devtools/kokoro/config/proto/build.proto
 
+timeout_mins: 420 # 7 hours
+
 # Tell the trampoline which build file to use.
 env_vars: {
     key: "TRAMPOLINE_BUILD_FILE"
diff --git a/.kokoro/python3.7/periodic.cfg b/.kokoro/python3.7/periodic.cfg
index 90879b0bec7e..c91164fa3b7c 100644
--- a/.kokoro/python3.7/periodic.cfg
+++ b/.kokoro/python3.7/periodic.cfg
@@ -14,6 +14,8 @@
 
 # Format: //devtools/kokoro/config/proto/build.proto
 
+timeout_mins: 420 # 7 hours
+
 # Tell the trampoline which build file to use.
 env_vars: {
     key: "TRAMPOLINE_BUILD_FILE"
diff --git a/.kokoro/python3.8/periodic.cfg b/.kokoro/python3.8/periodic.cfg
index 90879b0bec7e..c91164fa3b7c 100644
--- a/.kokoro/python3.8/periodic.cfg
+++ b/.kokoro/python3.8/periodic.cfg
@@ -14,6 +14,8 @@
 
 # Format: //devtools/kokoro/config/proto/build.proto
 
+timeout_mins: 420 # 7 hours
+
 # Tell the trampoline which build file to use.
 env_vars: {
     key: "TRAMPOLINE_BUILD_FILE"