diff --git a/doc/lua/test.sh b/doc/lua/test.sh
index 316f34c865..1661aadbbc 100755
--- a/doc/lua/test.sh
+++ b/doc/lua/test.sh
@@ -9,7 +9,7 @@ LEANLUA=$1
 NUM_ERRORS=0
 for f in `ls *.md`; do
     echo "-- testing $f"
-    awk 'BEGIN{ in_block = 0 } !/```/{ if (in_block == 1) print $0; else print "" } /```/{ in_block = 0; print "" } /```lua/{ in_block = 1; print "" }' $f > $f.lua
+    awk 'BEGIN{ in_block = 0 } !/```/{ if (in_block == 1) print $0; else print "" } /```/ && !/```lua/{ in_block = 0; print "" } /```lua/{ in_block = 1; print "" }' $f > $f.lua
     if $LEANLUA $f.lua > $f.produced.out; then
         echo "-- worked"
     else
diff --git a/doc/lua/test_single.sh b/doc/lua/test_single.sh
index 67de6ab5be..7288daab3b 100755
--- a/doc/lua/test_single.sh
+++ b/doc/lua/test_single.sh
@@ -8,7 +8,7 @@ ulimit -s unlimited
 LEANLUA=$1
 f=$2
 echo "-- testing $f"
-awk 'BEGIN{ in_block = 0 } !/```/{ if (in_block == 1) print $0; else print "" } /```/{ in_block = 0; print "" } /```lua/{ in_block = 1; print "" }' $f > $f.lua
+awk 'BEGIN{ in_block = 0 } !/```/{ if (in_block == 1) print $0; else print "" } /```/ && !/```lua/{ in_block = 0; print "" } /```lua/{ in_block = 1; print "" }' $f > $f.lua
 if $LEANLUA $f.lua > $f.produced.out; then
     echo "-- worked"
     exit 0