diff --git a/test/stack-spec.sh b/test/stack-spec.sh
index f04a10c..1165953 100755
--- a/test/stack-spec.sh
+++ b/test/stack-spec.sh
@@ -72,28 +72,30 @@ describe "_bma_stack_template_arg:" "$(
 
 )"
 
-[[ -d cloudformation/params ]] || mkdir -p cloudformation/params
+TEST_DIR=$(mktemp -d)
+
+[[ -d "$TEST_DIR"/cloudformation/params ]] || mkdir -p "$TEST_DIR"/cloudformation/params
 
 
 # templates
 touch            \
-  $(dirname $0)/cloudformation/great-app.json \
-  $(dirname $0)/cloudformation/great-app.yml  \
-  $(dirname $0)/cloudformation/great-app.yaml \
+  "$TEST_DIR"/cloudformation/great-app.json \
+  "$TEST_DIR"/cloudformation/great-app.yml  \
+  "$TEST_DIR"/cloudformation/great-app.yaml \
 
 # params
 
 [[ -d params ]] || mkdir params
 
 touch                                      \
-  $(dirname $0)/cloudformation/great-app-params.json                    \
-  $(dirname $0)/cloudformation/great-app-params-staging.json            \
-  $(dirname $0)/cloudformation/great-app-params-another-env.json        \
-  $(dirname $0)/cloudformation/params/great-app-params.json             \
-  $(dirname $0)/cloudformation/params/great-app-params-staging.json     \
-  $(dirname $0)/cloudformation/params/great-app-params-another-env.json
+  "$TEST_DIR"/cloudformation/great-app-params.json                    \
+  "$TEST_DIR"/cloudformation/great-app-params-staging.json            \
+  "$TEST_DIR"/cloudformation/great-app-params-another-env.json        \
+  "$TEST_DIR"/cloudformation/params/great-app-params.json             \
+  "$TEST_DIR"/cloudformation/params/great-app-params-staging.json     \
+  "$TEST_DIR"/cloudformation/params/great-app-params-another-env.json
 
-cd $(dirname $0)/cloudformation
+cd "$TEST_DIR"/cloudformation
 
 describe "_bma_stack_args:" "$(
   context "without an argument" "$(
@@ -115,3 +117,5 @@ describe "_bma_stack_args:" "$(
 )"
 
 cd -
+
+rm -rf "$TEST_DIR"