diff --git a/testcases/nullmoves.gcode b/testcases/nullmoves.gcode
new file mode 100644
index 0000000..8ce097b
--- /dev/null
+++ b/testcases/nullmoves.gcode
@@ -0,0 +1,16 @@
+(run this with STEPS_PER_M_X < 500000)
+(for example, the typical 80000)
+G21
+G90
+G1 X5 F400
+G1 X0
+G1 F200
+G1 X10
+G1 F400
+G1 X20
+G1 X20.001
+G1 X20.002
+G1 X20.003
+G1 X25
+G1 X0
+M2
diff --git a/testcases/straight-speeds.gcode b/testcases/straight-speeds.gcode
index 77c6fc1..915b954 100644
--- a/testcases/straight-speeds.gcode
+++ b/testcases/straight-speeds.gcode
@@ -13,4 +13,4 @@ G1 X10 Y10 F200
 G1 X20 Y20 F400
 G1 X100 Y100 F1500
 G1 X0 Y0
-M2
\ No newline at end of file
+M2