1 files changed, 4 insertions, 0 deletions
diff --git a/tests/gen_test_cases.sh b/tests/gen_test_cases.sh
index 19b74472..540fc2a2 100755
--- a/tests/gen_test_cases.sh
+++ b/tests/gen_test_cases.sh
@@ -35,6 +35,10 @@ function generate_test_signatures {
 # Generate a file with random bytes for signature tests.
 function generate_test_file {
   echo "Generating test file..."
+  if [ -f "${TEST_FILE}" ]; then
+    echo "(skipping, file already exists)"
+    return
+  fi
   dd if=/dev/urandom of=${TEST_FILE} bs=${TEST_FILE_SIZE} count=1
 }