diff --git a/tests/driver_adt7310/Makefile b/tests/driver_adt7310/Makefile
index ad673da932..b0d29190e8 100644
--- a/tests/driver_adt7310/Makefile
+++ b/tests/driver_adt7310/Makefile
@@ -6,17 +6,12 @@ FEATURES_REQUIRED = periph_spi periph_gpio
 USEMODULE += adt7310
 USEMODULE += xtimer
 
-ifneq (,$(TEST_ADT7310_SPI))
-  CFLAGS += -DTEST_ADT7310_SPI=$(TEST_ADT7310_SPI)
-else
-  # set arbitrary default
-  CFLAGS += -DTEST_ADT7310_SPI=SPI_0
-endif
-ifneq (,$(TEST_ADT7310_CS))
-  CFLAGS += -DTEST_ADT7310_CS=$(TEST_ADT7310_CS)
-else
-  # set arbitrary default
-  CFLAGS += -DTEST_ADT7310_CS=GPIO_PIN\(0,0\)
-endif
+# set default device parameters in case they are undefined
+TEST_ADT7310_SPI ?= SPI_0
+TEST_ADT7310_CS  ?= GPIO_PIN\(0,0\)
+
+# export parameters
+CFLAGS += -DTEST_ADT7310_SPI=$(TEST_ADT7310_SPI)
+CFLAGS += -DTEST_ADT7310_CS=$(TEST_ADT7310_CS)
 
 include $(RIOTBASE)/Makefile.include