diff --git a/tests/test-upskill.sh b/tests/test-upskill.sh
index 868d6ca..9fe4f7d 100755
--- a/tests/test-upskill.sh
+++ b/tests/test-upskill.sh
@@ -18,7 +18,7 @@ trap cleanup EXIT
 pushd "$TMP" >/dev/null
 
 echo "Running upskill (first run) ..."
-"$ROOT_DIR/upskill" adobe/helix-website -b agent-skills
+"$ROOT_DIR/upskill" adobe/helix-website
 
 test -d .claude/skills || { echo "FAIL: .claude/skills missing"; exit 1; }
 count_skills=$(find .claude/skills -name 'SKILL.md' -type f | wc -l | tr -d ' ')
@@ -39,7 +39,7 @@ count_markers=$(grep -cF "$marker_start" AGENTS.md)
 [[ "$count_markers" == "1" ]] || { echo "FAIL: duplicate start markers on first run"; exit 1; }
 
 echo "Running upskill (second run) ..."
-"$ROOT_DIR/upskill" adobe/helix-website -b agent-skills
+"$ROOT_DIR/upskill" adobe/helix-website
 
 count_markers2=$(grep -cF "$marker_start" AGENTS.md)
 [[ "$count_markers2" == "1" ]] || { echo "FAIL: duplicate start markers after second run"; exit 1; }
@@ -51,7 +51,7 @@ echo "$out" | grep -q -- "---" || { echo "FAIL: discover-skills separator missin
 
 # Test gitignore insertion with -i
 echo "Running upskill with -i ..."
-"$ROOT_DIR/upskill" -i adobe/helix-website -b agent-skills
+"$ROOT_DIR/upskill" -i adobe/helix-website
 
 test -f .gitignore || { echo "FAIL: .gitignore not created"; exit 1; }
 grep -qF ".claude/skills/" .gitignore || { echo "FAIL: .gitignore missing skills entry"; exit 1; }
@@ -60,7 +60,7 @@ grep -qF ".agents/discover-skills" .gitignore || { echo "FAIL: .gitignore missin
 # Ensure idempotent block
 start_marker="# upskill:gitignore:start"
 [[ $(grep -cF "$start_marker" .gitignore) == "1" ]] || { echo "FAIL: duplicate gitignore block after first -i"; exit 1; }
-"$ROOT_DIR/upskill" -i adobe/helix-website -b agent-skills
+"$ROOT_DIR/upskill" -i adobe/helix-website
 [[ $(grep -cF "$start_marker" .gitignore) == "1" ]] || { echo "FAIL: duplicate gitignore block after second -i"; exit 1; }
 
 echo "OK"
diff --git a/upskill b/upskill
index 9f29e6d..854b9f6 100755
--- a/upskill
+++ b/upskill
@@ -126,7 +126,7 @@ process_skills_directory() {
   local count=0
   # Count skills first
   while IFS= read -r -d '' skill_file; do
-    ((count++))
+    count=$((count + 1))
   done < <(find "$skills_dir" -type f -name 'SKILL.md' -print0)
 
   if [[ $count -eq 0 ]]; then
@@ -244,7 +244,7 @@ list_skills() {
   local count=0
   local -a skill_names=()
   while IFS='|' read -r name path description; do
-    ((count++))
+    count=$((count + 1))
     skill_names+=("$name")
 
     # Make path relative to search_dir
@@ -414,7 +414,7 @@ main() {
       log "Installing all $total_count skills..."
       while IFS='|' read -r name path description; do
         copy_skill "$path" "$dest_skills_dir"
-        ((skill_count++))
+        skill_count=$((skill_count + 1))
       done <"$tmpfile"
     elif [[ ${#selected_skills[@]} -gt 0 ]]; then
       log "Installing ${#selected_skills[@]} selected skill(s)..."
@@ -423,7 +423,7 @@ main() {
         while IFS='|' read -r name path description; do
           if [[ "$name" == "$skill_name" ]]; then
             copy_skill "$path" "$dest_skills_dir"
-            ((skill_count++))
+            skill_count=$((skill_count + 1))
             found=1
             break
           fi