diff --git a/testcases/straight-speeds-Fsep.gcode b/testcases/straight-speeds-Fsep.gcode
new file mode 100644
index 0000000..c5e93c6
--- /dev/null
+++ b/testcases/straight-speeds-Fsep.gcode
@@ -0,0 +1,24 @@
+G21
+G90
+F400
+G1 X5
+G1 X0
+G1 F200
+G1 X10
+G1 F400
+G1 X20
+G1 F1500
+G1 X100
+G1 X0
+G1 F200
+G1 Z1
+G1 F200
+G1 X10 Y10
+G1 F400
+G1 X20 Y20
+G1 F1500
+G1 X100 Y100
+G1 X0 Y0
+M2
+(Identical to straight-speeds.gcode,)
+(but F keywords in a seperate line.)