diff --git a/.github/workflows/blockifier_compiled_cairo.yml b/.github/workflows/blockifier_compiled_cairo.yml
index 0210132d5d7..6d61436d58e 100644
--- a/.github/workflows/blockifier_compiled_cairo.yml
+++ b/.github/workflows/blockifier_compiled_cairo.yml
@@ -39,10 +39,12 @@ jobs:
         id: setup-pypy
         with:
           python-version: 'pypy3.9'
+          cache: 'pip'
       - run: ln -s '${{ steps.setup-pypy.outputs.python-path }}' /usr/local/bin/pypy3.9
       - env:
           LD_LIBRARY_PATH: ${{ env.Python3_ROOT_DIR }}/bin
         run: echo "LD_LIBRARY_PATH=${LD_LIBRARY_PATH}" >> $GITHUB_ENV
+      - run: pip install -r scripts/requirements.txt
 
       - name: Verify cairo contract recompilation (both cairo versions).
         run:
diff --git a/.github/workflows/blockifier_post-merge.yml b/.github/workflows/blockifier_post-merge.yml
index 2ffd188d315..37502042ffb 100644
--- a/.github/workflows/blockifier_post-merge.yml
+++ b/.github/workflows/blockifier_post-merge.yml
@@ -25,6 +25,7 @@ jobs:
         id: setup-pypy
         with:
           python-version: 'pypy3.9'
+          cache: 'pip'
       - run: ln -s '${{ steps.setup-pypy.outputs.python-path }}' /usr/local/bin/pypy3.9
       - env:
           LD_LIBRARY_PATH: ${{ env.Python3_ROOT_DIR }}/bin
diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index bef3adebaea..cb64b1bdc44 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -48,10 +48,12 @@ jobs:
         id: setup-pypy
         with:
           python-version: "pypy3.9"
+          cache: 'pip'
       - run: ln -s '${{ steps.setup-pypy.outputs.python-path }}' /usr/local/bin/pypy3.9
       - env:
           LD_LIBRARY_PATH: ${{ steps.setup-pypy.outputs.pythonLocation }}/bin
         run: echo "LD_LIBRARY_PATH=${LD_LIBRARY_PATH}" >> $GITHUB_ENV
+      - run: pip install -r scripts/requirements.txt
 
       # Install rust components.
       - uses: ./.github/actions/bootstrap
@@ -59,11 +61,6 @@ jobs:
           extra_rust_toolchains: ${{ env.EXTRA_RUST_TOOLCHAINS }}
           github_token: ${{ secrets.GITHUB_TOKEN }}
 
-      - name: Setup Python venv
-        run: |
-          python3 -m venv ci
-          ci/bin/pip install -r scripts/requirements.txt
-
       # Check Cargo.lock is up to date.
       - name: "Check Cargo.lock"
         run: |
@@ -77,13 +74,13 @@ jobs:
       # Run code style on PR.
       - name: "Run TODO style pull request"
         if: github.event_name == 'pull_request'
-        run: ci/bin/python scripts/named_todos.py --commit_id ${{ github.event.pull_request.base.sha }}
+        run: scripts/named_todos.py --commit_id ${{ github.event.pull_request.base.sha }}
       - name: "Run clippy pull request"
         if: github.event_name == 'pull_request'
-        run: ci/bin/python scripts/run_tests.py --command clippy --changes_only --commit_id ${{ github.event.pull_request.base.sha }}
+        run: scripts/run_tests.py --command clippy --changes_only --commit_id ${{ github.event.pull_request.base.sha }}
       - name: "Run cargo doc pull request"
         if: github.event_name == 'pull_request'
-        run: ci/bin/python scripts/run_tests.py --command doc --changes_only --commit_id ${{ github.event.pull_request.base.sha }}
+        run: scripts/run_tests.py --command doc --changes_only --commit_id ${{ github.event.pull_request.base.sha }}
 
       # Run code style on push.
       - name: "Run rustfmt"
@@ -93,10 +90,10 @@ jobs:
 
       - name: "Run clippy on push"
         if: github.event_name == 'push'
-        run: ci/bin/python scripts/run_tests.py --command clippy
+        run: scripts/run_tests.py --command clippy
       - name: "Run cargo doc on push"
         if: github.event_name == 'push'
-        run: ci/bin/python scripts/run_tests.py --command doc
+        run: scripts/run_tests.py --command doc
 
       - name: "Run taplo"
         run: scripts/taplo.sh
@@ -128,10 +125,13 @@ jobs:
         id: setup-pypy
         with:
           python-version: "pypy3.9"
+          cache: 'pip'
       - run: ln -s '${{ steps.setup-pypy.outputs.python-path }}' /usr/local/bin/pypy3.9
       - env:
           LD_LIBRARY_PATH: ${{ env.Python3_ROOT_DIR }}/bin
         run: echo "LD_LIBRARY_PATH=${LD_LIBRARY_PATH}" >> $GITHUB_ENV
+      - run: pip install -r scripts/requirements.txt
+
       # TODO(Gilad): only one test needs this (base_layer_test.rs), once it migrates to
       # anvil, remove.
       - run: npm install -g ganache@7.4.3
@@ -139,9 +139,7 @@ jobs:
       - name: "Run tests pull request"
         if: github.event_name == 'pull_request'
         run: |
-          python3 -m venv ci
-          ci/bin/pip install -r scripts/requirements.txt
-          ci/bin/python scripts/run_tests.py --command test --changes_only --include_dependencies --commit_id ${{ github.event.pull_request.base.sha }}
+          scripts/run_tests.py --command test --changes_only --include_dependencies --commit_id ${{ github.event.pull_request.base.sha }}
         env:
           SEED: 0
 
@@ -149,9 +147,7 @@ jobs:
         if: github.event_name == 'push'
         # TODO(AdiY/Dori): Better support for running tests on push.
         run: |
-          python3 -m venv ci
-          ci/bin/pip install -r scripts/requirements.txt
-          ci/bin/python scripts/run_tests.py --command test
+          scripts/run_tests.py --command test
         env:
           SEED: 0
 
@@ -171,10 +167,13 @@ jobs:
         id: setup-pypy
         with:
           python-version: "pypy3.9"
+          cache: 'pip'
       - run: ln -s '${{ steps.setup-pypy.outputs.python-path }}' /usr/local/bin/pypy3.9
       - env:
           LD_LIBRARY_PATH: ${{ env.Python3_ROOT_DIR }}/bin
         run: echo "LD_LIBRARY_PATH=${LD_LIBRARY_PATH}" >> $GITHUB_ENV
+      - run: pip install -r scripts/requirements.txt
+      
       # TODO(Gilad): only one test needs this (base_layer_test.rs), once it migrates to
       # anvil, remove.
       - run: npm install -g ganache@7.4.3
@@ -182,8 +181,6 @@ jobs:
       - name: "Run integration tests pull request"
         if: github.event_name == 'pull_request'
         run: |
-          python3 -m venv ci
-          ci/bin/pip install -r scripts/requirements.txt
-          ci/bin/python scripts/run_tests.py --command integration --changes_only --include_dependencies --commit_id ${{ github.event.pull_request.base.sha }}
+          scripts/run_tests.py --command integration --changes_only --include_dependencies --commit_id ${{ github.event.pull_request.base.sha }}
         env:
           SEED: 0
diff --git a/.github/workflows/main_nightly.yml b/.github/workflows/main_nightly.yml
index 04e11ee537f..c78f2b69561 100644
--- a/.github/workflows/main_nightly.yml
+++ b/.github/workflows/main_nightly.yml
@@ -40,24 +40,21 @@ jobs:
         id: setup-pypy
         with:
           python-version: "pypy3.9"
+          cache: 'pip'
       - run: ln -s '${{ steps.setup-pypy.outputs.python-path }}' /usr/local/bin/pypy3.9
       - env:
           LD_LIBRARY_PATH: ${{ steps.setup-pypy.outputs.pythonLocation }}/bin
         run: echo "LD_LIBRARY_PATH=${LD_LIBRARY_PATH}" >> $GITHUB_ENV
+      - run: pip install -r scripts/requirements.txt
 
       # Install rust components.
       - uses: ./.github/actions/bootstrap
         with:
           github_token: ${{ secrets.GITHUB_TOKEN }}
 
-      - name: Setup Python venv
-        run: |
-          python3 -m venv ci
-          ci/bin/pip install -r scripts/requirements.txt
-
       # Run feature combo test.
       - name: "Run feature combo on all crates."
-        run: ci/bin/python scripts/run_feature_combos_test.py
+        run: scripts/run_feature_combos_test.py
 
   run-integration-tests:
     runs-on: starkware-ubuntu-24.04-large
@@ -77,14 +74,13 @@ jobs:
       - env:
           LD_LIBRARY_PATH: ${{ env.Python3_ROOT_DIR }}/bin
         run: echo "LD_LIBRARY_PATH=${LD_LIBRARY_PATH}" >> $GITHUB_ENV
+      - run: pip install -r scripts/requirements.txt
       # TODO(Gilad): only one test needs this (base_layer_test.rs), once it migrates to
       # anvil, remove.
       - run: npm install -g ganache@7.4.3
 
       - name: "Run integration tests pull request"
         run: |
-          python3 -m venv ci
-          ci/bin/pip install -r scripts/requirements.txt
-          ci/bin/python scripts/run_tests.py --command integration --is_nightly
+          scripts/run_tests.py --command integration --is_nightly
         env:
           SEED: 0
diff --git a/.github/workflows/merge_paths_ci.yml b/.github/workflows/merge_paths_ci.yml
index a5fc183da34..efb485de0f7 100644
--- a/.github/workflows/merge_paths_ci.yml
+++ b/.github/workflows/merge_paths_ci.yml
@@ -33,6 +33,7 @@ jobs:
       - uses: actions/setup-python@v5
         with:
           python-version: '3.9'
+          cache: 'pip'
       - run: |
           python -m pip install --upgrade pip
           pip install pytest
diff --git a/.github/workflows/merge_queue_ci.yml b/.github/workflows/merge_queue_ci.yml
index fd6287d98a0..abc056eea02 100644
--- a/.github/workflows/merge_queue_ci.yml
+++ b/.github/workflows/merge_queue_ci.yml
@@ -22,10 +22,12 @@ jobs:
         id: setup-pypy
         with:
           python-version: "pypy3.9"
+          cache: 'pip'
       - run: ln -s '${{ steps.setup-pypy.outputs.python-path }}' /usr/local/bin/pypy3.9
       - env:
           LD_LIBRARY_PATH: ${{ steps.setup-pypy.outputs.pythonLocation }}/bin
         run: echo "LD_LIBRARY_PATH=${LD_LIBRARY_PATH}" >> $GITHUB_ENV
+      - run: pip install -r scripts/requirements.txt
 
       # Install rust components.
       - uses: ./.github/actions/bootstrap
@@ -33,11 +35,6 @@ jobs:
           extra_rust_toolchains: ${{ env.EXTRA_RUST_TOOLCHAINS }}
           github_token: ${{ secrets.GITHUB_TOKEN }}
 
-      - name: Setup Python venv
-        run: |
-          python3 -m venv ci
-          ci/bin/pip install -r scripts/requirements.txt
-
       # Check Cargo.lock is up to date.
       - name: "Check Cargo.lock"
         run: |
@@ -45,7 +42,7 @@ jobs:
           git diff --exit-code Cargo.lock
 
       - name: "Run clippy on merge queue"
-        run: ci/bin/python scripts/run_tests.py --command clippy
+        run: scripts/run_tests.py --command clippy
 
       - name: "Run rustfmt on merge queue"
         # The nightly here is coupled with the one in install_rust/action.yml.
diff --git a/scripts/named_todos.py b/scripts/named_todos.py
index 33e9bb1b9ac..ebc7249af63 100755
--- a/scripts/named_todos.py
+++ b/scripts/named_todos.py
@@ -1,3 +1,5 @@
+#!/bin/env python3
+
 import os
 import re