diff --git a/ports/unix/variants/coverage/mpconfigvariant.h b/ports/unix/variants/coverage/mpconfigvariant.h
index 14f6b8331e..2e36355ca6 100644
--- a/ports/unix/variants/coverage/mpconfigvariant.h
+++ b/ports/unix/variants/coverage/mpconfigvariant.h
@@ -31,7 +31,6 @@
 #define MICROPY_CONFIG_ROM_LEVEL (MICROPY_CONFIG_ROM_LEVEL_EXTRA_FEATURES)
 
 // Disable some features that come enabled by default with the feature level.
-#define MICROPY_OPT_MPZ_BITWISE                 (0)
 #define MICROPY_MODULE_BUILTIN_INIT             (0)
 #define MICROPY_PY_BUILTINS_EXECFILE            (0)
 #define MICROPY_PY_SYS_STDIO_BUFFER             (0)
diff --git a/ports/unix/variants/dev/mpconfigvariant.h b/ports/unix/variants/dev/mpconfigvariant.h
index 16799322ff..87e89dc2a1 100644
--- a/ports/unix/variants/dev/mpconfigvariant.h
+++ b/ports/unix/variants/dev/mpconfigvariant.h
@@ -28,17 +28,10 @@
 #define MICROPY_CONFIG_ROM_LEVEL (MICROPY_CONFIG_ROM_LEVEL_EXTRA_FEATURES)
 
 // Disable some features that come enabled by default with the feature level.
-#define MICROPY_OPT_MPZ_BITWISE                 (0)
-#define MICROPY_OPT_MATH_FACTORIAL              (0)
-#define MICROPY_MODULE_ATTR_DELEGATION          (0)
 #define MICROPY_MODULE_BUILTIN_INIT             (0)
 #define MICROPY_PY_BUILTINS_EXECFILE            (0)
-#define MICROPY_PY_MATH_FACTORIAL               (0)
-#define MICROPY_PY_SYS_PS1_PS2                  (0)
 #define MICROPY_PY_SYS_STDIO_BUFFER             (0)
 #define MICROPY_PY_USELECT                      (0)
-#define MICROPY_PY_URE_SUB                      (0)
-#define MICROPY_PY_FRAMEBUF                     (0)
 
 // Enable some additional features.
 #define MICROPY_REPL_EMACS_WORDS_MOVE           (1)