diff --git a/.travis.yml b/.travis.yml
index 2759ef15..00dec06d 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,8 +1,7 @@
 language: cpp
-dist: focal
+dist: bionic
 os: linux
 compiler: gcc
-addons:
     apt:
         sources:
         - ubuntu-toolchain-r-test
diff --git a/hw/unittest/.gitignore b/hw/unittest/.gitignore
new file mode 100644
index 00000000..fff61206
--- /dev/null
+++ b/hw/unittest/.gitignore
@@ -0,0 +1 @@
+*/obj_dir/*
\ No newline at end of file