diff --git a/lib/commands/reshim.sh b/lib/commands/reshim.sh
index 22c98b99..34987bb5 100644
--- a/lib/commands/reshim.sh
+++ b/lib/commands/reshim.sh
@@ -51,7 +51,7 @@ write_shim_script() {
     cp "$plugin_shims_path/$executable_name" "$shim_path"
   elif [ -f "$shim_path" ]; then
     if ! grep "# asdf-plugin-version: $version" "$shim_path" > /dev/null; then
-      sed "$shim_path" -i'' -e "s/\(asdf-plugin: $plugin_name\)/\1\n# asdf-plugin-version: $version/"
+     sed -i'' -e "s/\(asdf-plugin: $plugin_name\)/\1\\"$'\n'"# asdf-plugin-version: $version/" "$shim_path"
     fi
   else
     cat <<EOF > "$shim_path"
@@ -191,7 +191,7 @@ remove_shim_for_version() {
     return 0
   fi
 
-  sed "$shim_path" -i'' -e "/# asdf-plugin-version: $version/d"
+  sed -i'' -e "/# asdf-plugin-version: $version/d" "$shim_path"
 
   if [ ! -f "$plugin_shims_path/$executable_name" ] && \
         ! grep "# asdf-plugin-version" "$shim_path" > /dev/null || \
diff --git a/test/install_command.bats b/test/install_command.bats
index 78779081..7d41ff4e 100644
--- a/test/install_command.bats
+++ b/test/install_command.bats
@@ -69,7 +69,7 @@ teardown() {
   [ "$status" -eq 0 ]
 
   lines_count=$(grep "asdf-plugin-version: 1.1" $ASDF_DIR/shims/dummy | wc -l)
-  [ "$lines_count" = "1" ]
+  [ "$lines_count" -eq "1" ]
 }