diff --git a/test-linuxcnc-rs274-native.sh b/test-linuxcnc-rs274-native.sh
index 9201db4..0e76828 100755
--- a/test-linuxcnc-rs274-native.sh
+++ b/test-linuxcnc-rs274-native.sh
@@ -781,7 +781,10 @@ for case in "${oword_reader_error_cases[@]}"; do
 done
 # Source basis: LinuxCNC src/emc/rs274ngc/interp_o_word.cc
 # convert_control_functions() rejects unmatched, duplicate, and
-# out-of-context O-word control labels during execution.
+# out-of-context O-word control labels during execution. control_save_offset()
+# rejects numbered subroutine definitions encountered again in the main file,
+# and interp_read.cc read_text() reports EOF when a file ends without a percent
+# sign or M2/M30 after returning to the main program.
 oword_execution_error_cases=(
     "linuxcnc_oword_endsub_without_sub_error|not in a subroutine definition"
     "linuxcnc_oword_return_without_sub_error|not in a subroutine definition"
@@ -802,6 +805,8 @@ oword_execution_error_cases=(
     "linuxcnc_oword_sub_requires_endsub_error|'O.... endsub' or 'O.... return' must follow 'O.... sub'"
     "linuxcnc_oword_too_many_call_levels_error|Too many subroutine levels"
     "linuxcnc_nested_subroutine_definition_error|Nested subroutine definition"
+    "linuxcnc_numeric_oword_main_eof_error|File ended with no percent sign"
+    "linuxcnc_numeric_oword_sub_illegal_location|found in illegal location"
 )
 for case in "${oword_execution_error_cases[@]}"; do
     fixture=${case%%|*}