diff --git a/.github/workflows/add-to-registry.yml b/.github/workflows/add-to-registry.yml
index d0536c8f..4b56a8fc 100644
--- a/.github/workflows/add-to-registry.yml
+++ b/.github/workflows/add-to-registry.yml
@@ -3,6 +3,8 @@ on:
   push:
     branches:
       - main
+    paths:
+      - '**/*.cairo'
       
 jobs:
   test:
diff --git a/tools/make/fuzzer.sh b/tools/make/fuzzer.sh
index 129ffaa0..f74e0c7f 100755
--- a/tools/make/fuzzer.sh
+++ b/tools/make/fuzzer.sh
@@ -49,12 +49,8 @@ cairo-compile --cairo_path="packages/eth_essentials" "$cairo_file" --output "bui
 # Export the function so it's accessible to subshells spawned by parallel
 export -f run_tests
 
-# Determine the number of available cores
-N=6
-echo "Using $N cores for parallel execution."
-
 # Run the same test file repeatedly, maintaining N parallel instances
-seq inf | parallel -j$N --halt soon,fail=1 run_tests $cairo_file
+seq inf | parallel --halt soon,fail=1 run_tests $cairo_file
 
 # Capture and return the exit status of parallel
 exit_status=$?
diff --git a/tools/make/requirements.txt b/tools/make/requirements.txt
index f3b41b6e..abdbd5ba 100644
--- a/tools/make/requirements.txt
+++ b/tools/make/requirements.txt
@@ -6,4 +6,4 @@ python-dotenv
 pysha3
 web3==5.28.0
 trie
-black
\ No newline at end of file
+black