diff --git a/tests/tcg/arm/Makefile.softmmu-target b/tests/tcg/arm/Makefile.softmmu-target
index 3fe237ba39..7df88ddea8 100644
--- a/tests/tcg/arm/Makefile.softmmu-target
+++ b/tests/tcg/arm/Makefile.softmmu-target
@@ -20,7 +20,7 @@ LDFLAGS+=-nostdlib -N -static
 
 # Specific Test Rules
 
-test-armv6m-undef: EXTRA_CFLAGS+=-mcpu=cortex-m0
+test-armv6m-undef: EXTRA_CFLAGS+=-mcpu=cortex-m0 -mfloat-abi=soft
 
 run-test-armv6m-undef: QEMU_OPTS+=-semihosting -M microbit -kernel
 run-plugin-test-armv6m-undef-%: QEMU_OPTS+=-semihosting -M microbit -kernel