diff --git a/src/test/regress/citus_tests/common.py b/src/test/regress/citus_tests/common.py
index 165304581..05fd43fab 100644
--- a/src/test/regress/citus_tests/common.py
+++ b/src/test/regress/citus_tests/common.py
@@ -92,7 +92,7 @@ PG_MAJOR_VERSION = get_pg_major_version()
 OLDEST_SUPPORTED_CITUS_VERSION_MATRIX = {
     14: "10.2.0",
     15: "11.1.5",
-    16: "13.0.0",
+    16: "12.1.5",
 }
 
 OLDEST_SUPPORTED_CITUS_VERSION = OLDEST_SUPPORTED_CITUS_VERSION_MATRIX[PG_MAJOR_VERSION]