diff --git a/tests/kernel/threads/no-multithreading/prj.conf b/tests/kernel/threads/no-multithreading/prj.conf
index c11665e29fc4e0..6e1dbf9c4beae0 100644
--- a/tests/kernel/threads/no-multithreading/prj.conf
+++ b/tests/kernel/threads/no-multithreading/prj.conf
@@ -1,5 +1,12 @@
 CONFIG_ZTEST=y
 CONFIG_MULTITHREADING=n
-CONFIG_USERSPACE=n
 CONFIG_BT=n
 CONFIG_USB=n
+
+# Running without multithreading implies the lack of MMU support.
+# Setting CONFIG_USERSPACE=n alone is not enough to disable userspace.
+# The TEST_USERSPACE symbol (designed to enable userspace by default
+# on tests platforms that support it) defaults to =y and will
+# automatically select it back.
+CONFIG_TEST_USERSPACE=n
+CONFIG_USERSPACE=n