diff --git a/tests/lib/db/instance-mysql b/tests/lib/db/instance-mysql
index 6d43ba8fe..cdea6e7cc 100755
--- a/tests/lib/db/instance-mysql
+++ b/tests/lib/db/instance-mysql
@@ -87,7 +87,7 @@ restore() {
 
 config_yaml() {
     MYSQL_PORT=${MYSQL_PORT} MYSQL_HOST=${MYSQL_HOST} yq '
-        .db_config.type="$DB_BACKEND"|
+        .db_config.type=strenv(DB_BACKEND)|
         .db_config.user="crowdsec_test" |
         .db_config.password="crowdsec_test" |
         .db_config.db_name="crowdsec_test"  |
diff --git a/tests/lib/db/instance-postgres b/tests/lib/db/instance-postgres
index b93980737..22dc34666 100755
--- a/tests/lib/db/instance-postgres
+++ b/tests/lib/db/instance-postgres
@@ -61,7 +61,7 @@ restore() {
 
 config_yaml() {
     yq '
-        .db_config.type="$DB_BACKEND"|
+        .db_config.type=strenv(DB_BACKEND)|
         .db_config.user="crowdsec_test" |
         .db_config.password="crowdsec_test" |
         .db_config.db_name="crowdsec_test"  |
diff --git a/tests/lib/db/instance-sqlite b/tests/lib/db/instance-sqlite
index 93e7d643e..5e1dc683a 100755
--- a/tests/lib/db/instance-sqlite
+++ b/tests/lib/db/instance-sqlite
@@ -31,7 +31,7 @@ DB_FILE="${DATA_DIR}/crowdsec.db"
 
 config_yaml() {
     yq '
-        .db_config.type="$DB_BACKEND" |
+        .db_config.type=strenv(DB_BACKEND) |
         .db_config.db_path="${DB_FILE}"
     ' -i "${CONFIG_YAML}"
 }