diff --git a/test/ci-runtests.sh b/test/ci-runtests.sh
index c13ff6b8cc24..7625b4dd5c85 100755
--- a/test/ci-runtests.sh
+++ b/test/ci-runtests.sh
@@ -30,11 +30,14 @@ echo "* Version to upgrade from: $OLD_APP_VERSION"
 echo "* Version to test: $NEW_APP_VERSION"
 echo "**********************************"
 
-DEFAULT_OSES=(debian11 debian12 ubuntu2004 ubuntu2204 ubuntu2304 fedora38 fedora37 fedora36 windows10 windows11)
+if [[ -z "${TEST_OSES+x}" ]]; then
+    echo "'TEST_OSES' must be specified" 1>&2
+    exit 1
+fi
+
 # Try to parse $TEST_OSES from the environment
 # https://www.shellcheck.net/wiki/SC2206
 IFS=" " read -r -a TEST_OSES <<< "${TEST_OSES:-}"
-TEST_OSES=( "${TEST_OSES[@]:-"${DEFAULT_OSES[@]}"}" )
 
 if [[ -z "${ACCOUNT_TOKENS+x}" ]]; then
     echo "'ACCOUNT_TOKENS' must be specified" 1>&2