diff --git a/tests/integration/kubernetes/gha-run.sh b/tests/integration/kubernetes/gha-run.sh
index e91bf7b20..5d2afbb34 100755
--- a/tests/integration/kubernetes/gha-run.sh
+++ b/tests/integration/kubernetes/gha-run.sh
@@ -213,7 +213,7 @@ function run_tests() {
 	# In case of running on Github workflow it needs to save the start time
 	# on the environment variables file so that the variable is exported on
 	# next workflow steps.
-	if [ -n "$GITHUB_ENV" ]; then
+	if [ -n "${GITHUB_ENV:-}" ]; then
 		start_time=$(date '+%Y-%m-%d %H:%M:%S')
 		export start_time
 		echo "start_time=${start_time}" >> "$GITHUB_ENV"
diff --git a/tests/integration/nerdctl/gha-run.sh b/tests/integration/nerdctl/gha-run.sh
index e762b760d..7b3c42a36 100644
--- a/tests/integration/nerdctl/gha-run.sh
+++ b/tests/integration/nerdctl/gha-run.sh
@@ -95,7 +95,7 @@ function run() {
 
 	enabling_hypervisor
 
-	if [ -n "$GITHUB_ENV" ]; then
+	if [ -n "${GITHUB_ENV:-}" ]; then
 		start_time=$(date '+%Y-%m-%d %H:%M:%S')
 		export start_time
 		echo "start_time=${start_time}" >> "$GITHUB_ENV"