diff --git a/tests/unit/app-json.bats b/tests/unit/app-json.bats
index 5e291a506..ef610184e 100644
--- a/tests/unit/app-json.bats
+++ b/tests/unit/app-json.bats
@@ -2,9 +2,11 @@
 load test_helper
 
 setup_file() {
-  add-apt-repository --yes ppa:cncf-buildpacks/pack-cli
-  apt-get update
-  apt-get --yes install pack-cli
+  if ! command -v "pack" &>/dev/null; then
+    add-apt-repository --yes ppa:cncf-buildpacks/pack-cli
+    apt-get update
+    apt-get --yes install pack-cli
+  fi
 }
 
 setup() {
@@ -48,7 +50,6 @@ teardown() {
   assert_success
 }
 
-
 @test "(app-json) app.json scripts postdeploy" {
   run deploy_app python dokku@dokku.me:$TEST_APP add_postdeploy_command
   echo "output: $output"
diff --git a/tests/unit/ps-cnb.bats b/tests/unit/ps-cnb.bats
index b7045ee9a..7d98ba0a6 100644
--- a/tests/unit/ps-cnb.bats
+++ b/tests/unit/ps-cnb.bats
@@ -3,9 +3,11 @@
 load test_helper
 
 setup_file() {
-  add-apt-repository --yes ppa:cncf-buildpacks/pack-cli
-  apt-get update
-  apt-get --yes install pack-cli
+  if ! command -v "pack" &>/dev/null; then
+    add-apt-repository --yes ppa:cncf-buildpacks/pack-cli
+    apt-get update
+    apt-get --yes install pack-cli
+  fi
 }
 
 setup() {