diff --git a/test-linuxcnc-source-link.sh b/test-linuxcnc-source-link.sh
index 2ee5aaf..21d71b4 100755
--- a/test-linuxcnc-source-link.sh
+++ b/test-linuxcnc-source-link.sh
@@ -1424,7 +1424,7 @@ fi
 grep -q "Cannot wait for digital input with cutter radius compensation on" \
     "$output_dir/cnc_sim_linuxcnc_source_cutter_comp_wait_input_error.err"
 # Source basis: LinuxCNC src/emc/rs274ngc/interp_convert.cc
-# convert_m() rejects M63-M65/M67-M68/M48-M49 while cutter radius
+# convert_m() rejects M63-M65/M67-M68/M48-M53 while cutter radius
 # compensation is active before enqueueing digital/analog output or override
 # canon side effects.
 cutter_comp_m_error_cases=(
@@ -1435,6 +1435,14 @@ cutter_comp_m_error_cases=(
     "linuxcnc_cutter_comp_m68_error|Cannot set auxiliary analog output with cutter radius compensation on"
     "linuxcnc_cutter_comp_m48_error|Cannot enable overrides with cutter radius compensation on"
     "linuxcnc_cutter_comp_m49_error|Cannot disable overrides with cutter radius compensation on"
+    "linuxcnc_cutter_comp_m50_enable_error|Cannot enable overrides with cutter radius compensation on"
+    "linuxcnc_cutter_comp_m50_disable_error|Cannot disable overrides with cutter radius compensation on"
+    "linuxcnc_cutter_comp_m51_enable_error|Cannot enable overrides with cutter radius compensation on"
+    "linuxcnc_cutter_comp_m51_disable_error|Cannot disable overrides with cutter radius compensation on"
+    "linuxcnc_cutter_comp_m52_enable_error|Cannot enable overrides with cutter radius compensation on"
+    "linuxcnc_cutter_comp_m52_disable_error|Cannot disable overrides with cutter radius compensation on"
+    "linuxcnc_cutter_comp_m53_enable_error|Cannot enable overrides with cutter radius compensation on"
+    "linuxcnc_cutter_comp_m53_disable_error|Cannot disable overrides with cutter radius compensation on"
 )
 for case in "${cutter_comp_m_error_cases[@]}"; do
     fixture=${case%%|*}
diff --git a/tests/gcode/linuxcnc_cutter_comp_m50_disable_error.ngc b/tests/gcode/linuxcnc_cutter_comp_m50_disable_error.ngc
new file mode 100644
index 0000000..3ad8632
--- /dev/null
+++ b/tests/gcode/linuxcnc_cutter_comp_m50_disable_error.ngc
@@ -0,0 +1,3 @@
+G21 G90 G17
+G41 D1
+M50 P0
diff --git a/tests/gcode/linuxcnc_cutter_comp_m50_enable_error.ngc b/tests/gcode/linuxcnc_cutter_comp_m50_enable_error.ngc
new file mode 100644
index 0000000..1798da7
--- /dev/null
+++ b/tests/gcode/linuxcnc_cutter_comp_m50_enable_error.ngc
@@ -0,0 +1,3 @@
+G21 G90 G17
+G41 D1
+M50 P1
diff --git a/tests/gcode/linuxcnc_cutter_comp_m51_disable_error.ngc b/tests/gcode/linuxcnc_cutter_comp_m51_disable_error.ngc
new file mode 100644
index 0000000..4c4c50e
--- /dev/null
+++ b/tests/gcode/linuxcnc_cutter_comp_m51_disable_error.ngc
@@ -0,0 +1,3 @@
+G21 G90 G17
+G41 D1
+M51 P0
diff --git a/tests/gcode/linuxcnc_cutter_comp_m51_enable_error.ngc b/tests/gcode/linuxcnc_cutter_comp_m51_enable_error.ngc
new file mode 100644
index 0000000..0a8409f
--- /dev/null
+++ b/tests/gcode/linuxcnc_cutter_comp_m51_enable_error.ngc
@@ -0,0 +1,3 @@
+G21 G90 G17
+G41 D1
+M51 P1
diff --git a/tests/gcode/linuxcnc_cutter_comp_m52_disable_error.ngc b/tests/gcode/linuxcnc_cutter_comp_m52_disable_error.ngc
new file mode 100644
index 0000000..5d0dbd3
--- /dev/null
+++ b/tests/gcode/linuxcnc_cutter_comp_m52_disable_error.ngc
@@ -0,0 +1,3 @@
+G21 G90 G17
+G41 D1
+M52 P0
diff --git a/tests/gcode/linuxcnc_cutter_comp_m52_enable_error.ngc b/tests/gcode/linuxcnc_cutter_comp_m52_enable_error.ngc
new file mode 100644
index 0000000..a9c040f
--- /dev/null
+++ b/tests/gcode/linuxcnc_cutter_comp_m52_enable_error.ngc
@@ -0,0 +1,3 @@
+G21 G90 G17
+G41 D1
+M52 P1
diff --git a/tests/gcode/linuxcnc_cutter_comp_m53_disable_error.ngc b/tests/gcode/linuxcnc_cutter_comp_m53_disable_error.ngc
new file mode 100644
index 0000000..e5a8ed1
--- /dev/null
+++ b/tests/gcode/linuxcnc_cutter_comp_m53_disable_error.ngc
@@ -0,0 +1,3 @@
+G21 G90 G17
+G41 D1
+M53 P0
diff --git a/tests/gcode/linuxcnc_cutter_comp_m53_enable_error.ngc b/tests/gcode/linuxcnc_cutter_comp_m53_enable_error.ngc
new file mode 100644
index 0000000..314b311
--- /dev/null
+++ b/tests/gcode/linuxcnc_cutter_comp_m53_enable_error.ngc
@@ -0,0 +1,3 @@
+G21 G90 G17
+G41 D1
+M53 P1