diff --git a/boards/openlabs-kw41z-mini-256kib/Makefile b/boards/openlabs-kw41z-mini-256kib/Makefile
new file mode 100644
index 0000000000..2b29bba011
--- /dev/null
+++ b/boards/openlabs-kw41z-mini-256kib/Makefile
@@ -0,0 +1,2 @@
+DIRS = $(RIOTBOARD)/openlabs-kw41z-mini
+include $(RIOTBASE)/Makefile.base
diff --git a/boards/openlabs-kw41z-mini-256kib/Makefile.dep b/boards/openlabs-kw41z-mini-256kib/Makefile.dep
new file mode 100644
index 0000000000..089a00f033
--- /dev/null
+++ b/boards/openlabs-kw41z-mini-256kib/Makefile.dep
@@ -0,0 +1 @@
+include $(RIOTBOARD)/openlabs-kw41z-mini/Makefile.dep
diff --git a/boards/openlabs-kw41z-mini-256kib/Makefile.features b/boards/openlabs-kw41z-mini-256kib/Makefile.features
new file mode 100644
index 0000000000..fd1f8c11b3
--- /dev/null
+++ b/boards/openlabs-kw41z-mini-256kib/Makefile.features
@@ -0,0 +1,2 @@
+CPU_MODEL = mkw41z256vht4
+include $(RIOTBOARD)/openlabs-kw41z-mini/Makefile.features
diff --git a/boards/openlabs-kw41z-mini-256kib/Makefile.include b/boards/openlabs-kw41z-mini-256kib/Makefile.include
new file mode 100644
index 0000000000..fb2b03342b
--- /dev/null
+++ b/boards/openlabs-kw41z-mini-256kib/Makefile.include
@@ -0,0 +1,4 @@
+SLOT0_LEN ?= 0x1C000
+
+INCLUDES  += -I$(RIOTBOARD)/openlabs-kw41z-mini/include
+include $(RIOTBOARD)/openlabs-kw41z-mini/Makefile.include
diff --git a/boards/openlabs-kw41z-mini/Makefile.features b/boards/openlabs-kw41z-mini/Makefile.features
index 6a2c44fe90..ffcdc24bea 100644
--- a/boards/openlabs-kw41z-mini/Makefile.features
+++ b/boards/openlabs-kw41z-mini/Makefile.features
@@ -1,5 +1,5 @@
 CPU = kinetis
-CPU_MODEL = mkw41z512vht4
+CPU_MODEL ?= mkw41z512vht4
 
 # Put defined MCU peripherals here (in alphabetical order)
 FEATURES_PROVIDED += periph_adc
diff --git a/tests/unittests/Makefile.ci b/tests/unittests/Makefile.ci
index 4831a1c002..e280cbe03d 100644
--- a/tests/unittests/Makefile.ci
+++ b/tests/unittests/Makefile.ci
@@ -64,6 +64,7 @@ BOARD_INSUFFICIENT_MEMORY := \
     nz32-sc151 \
     olimexino-stm32 \
     opencm904 \
+    openlabs-kw41z-mini-256kib \
     pba-d-01-kw2x \
     samd21-xpro \
     saml10-xpro \