diff --git a/CMakeLists.txt b/CMakeLists.txt
index 2354e8fc..13a76311 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -11,7 +11,7 @@ set(YAZE_BUILD_LIB ON)
 set(YAZE_BUILD_EMU ON)
 set(YAZE_BUILD_Z3ED ON)
 set(YAZE_BUILD_PYTHON OFF)
-set(YAZE_BUILD_TESTS OFF)
+set(YAZE_BUILD_TESTS ON)
 set(YAZE_INSTALL_LIB OFF)
 
 # libpng features in bitmap.cc
diff --git a/src/app/zelda3/overworld/overworld.h b/src/app/zelda3/overworld/overworld.h
index 505d5334..b2d574a4 100644
--- a/src/app/zelda3/overworld/overworld.h
+++ b/src/app/zelda3/overworld/overworld.h
@@ -438,11 +438,6 @@ constexpr int LimitOfMap32 = 8864;
 constexpr int NumberOfOWSprites = 352;
 constexpr int NumberOfMap32 = Map32PerScreen * kNumOverworldMaps;
 
-struct MapData {
-  std::vector<uint8_t> highData;
-  std::vector<uint8_t> lowData;
-};
-
 /**
  * @brief Represents the full Overworld data, light and dark world.
  *