diff --git a/subsys/testsuite/ztest/Kconfig b/subsys/testsuite/ztest/Kconfig
index e7b148caa7d..e6b546a5493 100644
--- a/subsys/testsuite/ztest/Kconfig
+++ b/subsys/testsuite/ztest/Kconfig
@@ -110,7 +110,6 @@ config ZTEST_PARAMETER_COUNT
 
 config ZTRESS
 	bool "Stress test framework"
-	depends on !SMP
 	select THREAD_RUNTIME_STATS
 	select THREAD_MONITOR
 	select TEST_RANDOM_GENERATOR if !ENTROPY_HAS_DRIVER
diff --git a/tests/lib/ringbuffer/testcase.yaml b/tests/lib/ringbuffer/testcase.yaml
index 3310654eb2f..e5bd8a9227d 100644
--- a/tests/lib/ringbuffer/testcase.yaml
+++ b/tests/lib/ringbuffer/testcase.yaml
@@ -5,10 +5,13 @@ tests:
   libraries.ring_buffer:
     integration_platforms:
       - native_posix
+    extra_configs:
+      - CONFIG_MP_NUM_CPUS=1
 
   libraries.ring_buffer_concurrent:
     platform_allow: qemu_x86
     extra_configs:
       - CONFIG_SYS_CLOCK_TICKS_PER_SEC=100000
+      - CONFIG_MP_NUM_CPUS=1
     integration_platforms:
       - qemu_x86
diff --git a/tests/ztest/ztress/testcase.yaml b/tests/ztest/ztress/testcase.yaml
index b07aea5539e..3dd881a7764 100644
--- a/tests/ztest/ztress/testcase.yaml
+++ b/tests/ztest/ztress/testcase.yaml
@@ -1,8 +1,10 @@
 common:
   tags: test_framework
-  filter: CONFIG_QEMU_TARGET and not CONFIG_SMP
+  filter: CONFIG_QEMU_TARGET
 tests:
   testing.ztest.ztress:
+    extra_configs:
+      - CONFIG_MP_NUM_CPUS=1
     integration_platforms:
       - qemu_x86
     #FIXME Fails for unknown reason #41710