diff --git a/.travis/build.sh b/.travis/build.sh
index 3a268b52b..a71e733f5 100755
--- a/.travis/build.sh
+++ b/.travis/build.sh
@@ -8,7 +8,7 @@ export DEVELOPER=${DEVELOPER:-1}
 export EXPERIMENTAL_FEATURES=${EXPERIMENTAL_FEATURES:-0}
 export COMPAT=${COMPAT:-1}
 export PATH=$CWD/dependencies/bin:"$HOME"/.local/bin:"$PATH"
-export PYTEST_PAR=2
+export PYTEST_PAR=${PYTEST_PAR:-2}
 export PYTEST_SENTRY_ALWAYS_REPORT=1
 export BOLTDIR=lightning-rfc
 export TEST_DB_PROVIDER=${DB:-"sqlite3"}