diff --git a/test_docker.sh b/test_docker.sh
index 9f48968..c6fa281 100755
--- a/test_docker.sh
+++ b/test_docker.sh
@@ -117,9 +117,8 @@ fi
 
 # Verify Vault is unsealed
 vault_status=$(docker-compose exec -T vault env VAULT_ADDR=http://127.0.0.1:8200 vault status -format=json 2>/dev/null || echo '{"sealed": true}')
-sealed=$(echo $vault_status | grep -o '"sealed":false' || echo "sealed")
 
-if [ "$sealed" = '"sealed":false' ]; then
+if [[ "$vault_status" == *'"sealed":false'* ]]; then
   log "INFO" "Vault is properly unsealed"
 else
   log "ERROR" "Vault is still sealed"
@@ -143,9 +142,8 @@ sleep 5
 
 # Verify Vault is sealed after restart (it should be)
 vault_status=$(docker-compose exec -T vault env VAULT_ADDR=http://127.0.0.1:8200 vault status -format=json 2>/dev/null || echo '{"sealed": true}')
-sealed=$(echo $vault_status | grep -o '"sealed":true' || echo "unsealed")
 
-if [ "$sealed" = '"sealed":true' ]; then
+if [[ "$vault_status" == *'"sealed":true'* ]]; then
   log "INFO" "Vault is correctly sealed after restart"
 else
   log "WARN" "Vault is not sealed after restart - this is unexpected"
@@ -167,9 +165,8 @@ docker-compose run -e VAULT_ADDR=http://vault:8200 \
 
 # Verify Vault is unsealed now
 vault_status=$(docker-compose exec -T vault env VAULT_ADDR=http://127.0.0.1:8200 vault status -format=json 2>/dev/null || echo '{"sealed": true}')
-sealed=$(echo $vault_status | grep -o '"sealed":false' || echo "sealed")
 
-if [ "$sealed" = '"sealed":false' ]; then
+if [[ "$vault_status" == *'"sealed":false'* ]]; then
   log "INFO" "Vault was successfully unsealed after restart"
 else
   log "ERROR" "Vault is still sealed after restart"