diff --git a/tools/testing/selftests/iommu/config b/tools/testing/selftests/iommu/config
index 110d73917615..02a2a1b267c1 100644
--- a/tools/testing/selftests/iommu/config
+++ b/tools/testing/selftests/iommu/config
@@ -1,3 +1,5 @@
 CONFIG_IOMMUFD=y
+CONFIG_FAULT_INJECTION_DEBUG_FS=y
 CONFIG_FAULT_INJECTION=y
 CONFIG_IOMMUFD_TEST=y
+CONFIG_FAILSLAB=y