diff --git a/cmake/utils.cmake b/cmake/utils.cmake
index 0e7cba1..8efbc22 100644
--- a/cmake/utils.cmake
+++ b/cmake/utils.cmake
@@ -44,7 +44,7 @@ function(rvscc_add_test)
 	PREFIX verilator_${TEST_TOP}
 	TOP_MODULE ${TEST_TOP}
 	TRACE
-	VERILATOR_ARGS --timing --assert -I${PROJECT_SOURCE_DIR}/hwinc
+	VERILATOR_ARGS --timing --assert -I${PROJECT_SOURCE_DIR}/include
   )
   target_compile_definitions(${TEST_TARGET_NAME} PRIVATE
     TEST_HEADER="verilator_${TEST_TOP}.h"
diff --git a/include/timescale.sv b/include/timescale.sv
new file mode 100644
index 0000000..b9c3f3d
--- /dev/null
+++ b/include/timescale.sv
@@ -0,0 +1,2 @@
+// Project timescale
+`timescale 1ns / 1ps