diff --git a/.ci/test-matrix.yml b/.ci/test-matrix.yml
index 570b68b..e1e63cf 100755
--- a/.ci/test-matrix.yml
+++ b/.ci/test-matrix.yml
@@ -2,6 +2,7 @@
 
 ELASTICSEARCH_VERSION:
   - 8.0.0-SNAPSHOT
+  - 7.5-SNAPSHOT
 
 TEST_SUITE:
   - oss