diff --git a/testcases/straight-speeds.gcode b/testcases/straight-speeds.gcode
new file mode 100644
index 0000000..6b3557d
--- /dev/null
+++ b/testcases/straight-speeds.gcode
@@ -0,0 +1,14 @@
+(This is test code for)
+(the look-ahead algorithm)
+G21
+G90
+G1 X10 F200
+G1 X20 F400
+G1 X100 F1500
+G1 X0
+G1 Z1 F200
+G1 X10 Y10 F200
+G1 X20 Y20 F400
+G1 X100 Y100 F1500
+G1 X0 Y0
+M2
\ No newline at end of file