diff --git a/.kokoro/presubmit/presubmit.cfg b/.kokoro/presubmit/presubmit.cfg
index 8f43917d9..b158096f0 100644
--- a/.kokoro/presubmit/presubmit.cfg
+++ b/.kokoro/presubmit/presubmit.cfg
@@ -1 +1,7 @@
-# Format: //devtools/kokoro/config/proto/build.proto
\ No newline at end of file
+# Format: //devtools/kokoro/config/proto/build.proto
+
+# Disable system tests.
+env_vars: {
+    key: "RUN_SYSTEM_TESTS"
+    value: "false"
+}
diff --git a/.kokoro/presubmit/system-3.7.cfg b/.kokoro/presubmit/system-3.7.cfg
new file mode 100644
index 000000000..461537b3f
--- /dev/null
+++ b/.kokoro/presubmit/system-3.7.cfg
@@ -0,0 +1,7 @@
+# Format: //devtools/kokoro/config/proto/build.proto
+
+# Only run this nox session.
+env_vars: {
+    key: "NOX_SESSION"
+    value: "system-3.7"
+}
\ No newline at end of file
diff --git a/owlbot.py b/owlbot.py
index f4cf08e0a..10f589442 100644
--- a/owlbot.py
+++ b/owlbot.py
@@ -136,6 +136,7 @@ def update_fixup_scripts(library):
     system_test_external_dependencies=["pytest-asyncio"],
     microgenerator=True,
     cov_level=100,
+    split_system_tests=True,
 )
 
 s.move(templated_files)