diff --git a/keyboards/handwired/splittest/keymaps/default/config.h b/keyboards/handwired/splittest/keymaps/default/config.h
deleted file mode 100644
index ecebd365891..00000000000
--- a/keyboards/handwired/splittest/keymaps/default/config.h
+++ /dev/null
@@ -1,23 +0,0 @@
-/*
-This is the c configuration file for the keymap
-
-Copyright 2012 Jun Wako <wakojun@gmail.com>
-Copyright 2015 Jack Humbert
-
-This program is free software: you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation, either version 2 of the License, or
-(at your option) any later version.
-
-This program is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with this program.  If not, see <http://www.gnu.org/licenses/>.
-*/
-
-#pragma once
-
-#define USE_I2C
diff --git a/keyboards/handwired/splittest/promicro/config.h b/keyboards/handwired/splittest/promicro/config.h
index c2a9c6002e6..de2414cb7b6 100644
--- a/keyboards/handwired/splittest/promicro/config.h
+++ b/keyboards/handwired/splittest/promicro/config.h
@@ -18,6 +18,9 @@
 
 #include "config_common.h"
 
+// use I2C on AVR
+#define USE_I2C
+
 // wiring of each half
 #define MATRIX_ROW_PINS { B3 }
 #define MATRIX_COL_PINS { B6 }
diff --git a/keyboards/handwired/splittest/teensy_2/config.h b/keyboards/handwired/splittest/teensy_2/config.h
index 7c092db3071..eadd42fb7c8 100644
--- a/keyboards/handwired/splittest/teensy_2/config.h
+++ b/keyboards/handwired/splittest/teensy_2/config.h
@@ -18,6 +18,9 @@
 
 #include "config_common.h"
 
+// use I2C on AVR
+#define USE_I2C
+
 // wiring of each half
 #define MATRIX_ROW_PINS { F5 }
 #define MATRIX_COL_PINS { F7 }