diff --git a/Makefile.am b/Makefile.am
index c2c0bb60..2699f2dd 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -429,7 +429,7 @@ test_apps = \
 	tests/test_reconnect_ivl \
 	tests/test_socket_null
 
-UNITY_CPPFLAGS = -I$(top_srcdir)/external/unity
+UNITY_CPPFLAGS = -I$(top_srcdir)/external/unity -DUNITY_USE_COMMAND_LINE_ARGS -DUNITY_EXCLUDE_FLOAT
 UNITY_LIBS = $(top_builddir)/external/unity/libunity.a
 noinst_LIBRARIES = external/unity/libunity.a
 external_unity_libunity_a_SOURCES = external/unity/unity.c \
diff --git a/tests/CMakeLists.txt b/tests/CMakeLists.txt
index a2e48ffd..cfb4423d 100644
--- a/tests/CMakeLists.txt
+++ b/tests/CMakeLists.txt
@@ -153,6 +153,7 @@ add_library (unity
     "${CMAKE_CURRENT_LIST_DIR}/../external/unity/unity_internals.h")
 set_target_properties (unity PROPERTIES
     PUBLIC_HEADER "${CMAKE_CURRENT_LIST_DIR}/../external/unity/unity.h")
+target_compile_definitions (unity PUBLIC "UNITY_USE_COMMAND_LINE_ARGS" "UNITY_EXCLUDE_FLOAT")
 target_include_directories (unity
     PUBLIC "${CMAKE_CURRENT_LIST_DIR}/../external/unity")