diff --git a/otto.sh b/otto.sh
index 1575b3d..c82a96a 100755
--- a/otto.sh
+++ b/otto.sh
@@ -42,16 +42,16 @@ add_module_to_cmakes () {
     echo "add_subdirectory(${basename})" >> ./src/CMakeLists.txt
     
     # Tests cmake file needs to be edited in place.
-    sed "s/# TEST_DIRS.*$/# TEST_DIRS\radd_subdirectory(${basename})\r/g" ./tests/CMakeLists.txt > ./tests/CMakeLists.txt    
-    sed "s/# TEST_LINKS.*$/# TEST_LINKS\r${basename}/g" ./tests/CMakeLists.txt > ./tests/CMakeLists.txt
+    sed -i'' "s/# TEST_DIRS.*$/# TEST_DIRS\r\nadd_subdirectory(${basename})/g" ./tests/CMakeLists.txt
+    sed -i'' "s/# TEST_LINKS.*$/# TEST_LINKS\r\n${basename}/g" ./tests/CMakeLists.txt
 }
 
 remove_module_from_cmakes () {
     local basename="$1"
 
-    sed "s/^.*add_subdirectory(${basename}).*$//g" ./src/CMakeLists.txt > ./src/CMakeLists.txt
-    sed "s/^.*add_subdirectory(${basename}).*$//g" ./tests/CMakeLists.txt > ./tests/CMakeLists.txt
-    set "s/^.*${basename}.*$//g" ./tests/CMakeLists.txt > ./tests/CMakeLists.txt
+    sed -i'' "s/^.*add_subdirectory(${basename}).*$//g" ./src/CMakeLists.txt
+    sed -i'' "s/^.*add_subdirectory(${basename}).*$//g" ./tests/CMakeLists.txt
+    sed -i'' "s/^.*${basename}.*$//g" ./tests/CMakeLists.txt
 }
 
 git_add_module () {
@@ -59,11 +59,11 @@ git_add_module () {
     local basename="$1"
     
     read -p "Auto add to git?(y/n):" CHOICE
-    if [ "${CHOICE}" -eq "n" ]; then
+    if [ "${CHOICE}" = "n" ]; then
         echo "not being added!"
         return 0
     fi
-
+    
     modsrc_dir="./src/${basename}"
     modtest_dir="./tests/${basename}"