1 files changed, 5 insertions, 1 deletions
diff --git a/gnu/tests/databases.scm b/gnu/tests/databases.scm
index 2ca13577a1..92be1a829b 100644
--- a/gnu/tests/databases.scm
+++ b/gnu/tests/databases.scm
@@ -389,7 +389,11 @@ data double PRECISION NULL
 
 (define %mysql-os
   (simple-operating-system
-   (service mysql-service-type)))
+   (service mysql-service-type
+            (mysql-configuration
+             ;; Disable O_DIRECT since it's not supported on overlayfs.
+             ;; See <https://jira.mariadb.org/browse/MDEV-28751>.
+             (extra-content "innodb-flush-method = fsync")))))
 
 (define* (run-mysql-test)
   "Run tests in %MYSQL-OS."