diff --git a/.github/workflows/blockifier_ci.yml b/.github/workflows/blockifier_ci.yml
index f3d745126c..b45246fd9b 100644
--- a/.github/workflows/blockifier_ci.yml
+++ b/.github/workflows/blockifier_ci.yml
@@ -41,7 +41,7 @@ concurrency:
 
 jobs:
   featureless-build:
-    runs-on: ubuntu-22.04
+    runs-on: starkware-ubuntu-20-04-medium
     steps:
       - uses: actions/checkout@v4
       - uses: ./.github/actions/bootstrap
diff --git a/.github/workflows/blockifier_compiled_cairo.yml b/.github/workflows/blockifier_compiled_cairo.yml
index 2dc33c6e68..2ad83fda7a 100644
--- a/.github/workflows/blockifier_compiled_cairo.yml
+++ b/.github/workflows/blockifier_compiled_cairo.yml
@@ -7,12 +7,12 @@ on:
       - reopened
       - synchronize
     paths:
-      - ".github/workflows/blockifier_compiled_cairo.yml"
-      - "crates/blockifier/feature_contracts/**"
-      - "crates/blockifier/src/test_utils/cairo_compile.rs"
-      - "crates/blockifier/tests/feature_contracts_compatibility_test.rs"
-      - "crates/blockifier/tests/requirements.txt"
-      - "scripts/dependencies.sh"
+      - '.github/workflows/blockifier_compiled_cairo.yml'
+      - 'crates/blockifier/feature_contracts/**'
+      - 'crates/blockifier/src/test_utils/cairo_compile.rs'
+      - 'crates/blockifier/tests/feature_contracts_compatibility_test.rs'
+      - 'crates/blockifier/tests/requirements.txt'
+      - 'scripts/dependencies.sh'
 
 # On PR events, cancel existing CI runs on this same PR for this workflow.
 concurrency:
@@ -21,7 +21,7 @@ concurrency:
 
 jobs:
   verify_cairo_file_dependencies:
-    runs-on: ubuntu-22.04
+    runs-on: starkware-ubuntu-20-04-medium
     steps:
       - uses: actions/checkout@v4
       - uses: ./.github/actions/bootstrap
@@ -30,7 +30,7 @@ jobs:
       - uses: actions/setup-python@v5
         id: setup-pypy
         with:
-          python-version: "pypy3.9"
+          python-version: 'pypy3.9'
       - run: ln -s '${{ steps.setup-pypy.outputs.python-path }}' /usr/local/bin/pypy3.9
       - env:
           LD_LIBRARY_PATH: ${{ env.Python3_ROOT_DIR }}/bin
@@ -40,16 +40,16 @@ jobs:
       - name: checkout sequencer into `sequencer` directory.
         uses: actions/checkout@v4
         with:
-          repository: "starkware-libs/sequencer"
-          path: "sequencer"
+          repository: 'starkware-libs/sequencer'
+          path: 'sequencer'
 
       - name: checkout cairo1 repo in order to compile cairo1 contracts.
         uses: actions/checkout@v4
         with:
-          repository: "starkware-libs/cairo"
+          repository: 'starkware-libs/cairo'
           fetch-depth: 0
           fetch-tags: true
-          path: "cairo"
+          path: 'cairo'
 
       - name: install toolchain for legacy contract compilation (old compiler tag)
         uses: actions-rs/toolchain@master
diff --git a/.github/workflows/clean_stale_prs.yml b/.github/workflows/clean_stale_prs.yml
index a30494b701..1ccbe73ac8 100644
--- a/.github/workflows/clean_stale_prs.yml
+++ b/.github/workflows/clean_stale_prs.yml
@@ -9,7 +9,7 @@ on:
 jobs:
   stale:
     name: 🧹 Clean up stale issues and PRs
-    runs-on: ubuntu-22.04
+    runs-on: starkware-ubuntu-latest-small
     steps:
       - name: 🚀 Run stale
         uses: actions/stale@v3
diff --git a/.github/workflows/lock_closed_prs.yml b/.github/workflows/lock_closed_prs.yml
index e49213b874..91b0175ffd 100644
--- a/.github/workflows/lock_closed_prs.yml
+++ b/.github/workflows/lock_closed_prs.yml
@@ -7,26 +7,26 @@ on:
   workflow_dispatch:
 
 jobs:
-  #  lock:
-  name: 🔒 Lock closed issues and PRs
-  runs-on: ubuntu-22.04
-  steps:
-    - uses: dessant/lock-threads@v2.0.3
-      with:
-        github-token: ${{ github.token }}
-        issue-lock-inactive-days: "30"
-        issue-lock-reason: ""
-        issue-comment: >
-          Issue closed and locked due to lack of activity.
-          
-          If you encounter this same issue, please open a new issue and refer
-          to this closed one.
-        pr-lock-inactive-days: "1"
-        pr-lock-reason: ""
-        pr-comment: >
-          Pull Request closed and locked due to lack of activity.
-          
-          If you'd like to build on this closed PR, you can clone it using
-          this method: https://stackoverflow.com/a/14969986
-          
-          Then open a new PR, referencing this closed PR in your message.
+  lock:
+    name: 🔒 Lock closed issues and PRs
+    runs-on: starkware-ubuntu-latest-small
+    steps:
+      - uses: dessant/lock-threads@v2.0.3
+        with:
+          github-token: ${{ github.token }}
+          issue-lock-inactive-days: "30"
+          issue-lock-reason: ""
+          issue-comment: >
+            Issue closed and locked due to lack of activity.
+
+            If you encounter this same issue, please open a new issue and refer
+            to this closed one.
+          pr-lock-inactive-days: "1"
+          pr-lock-reason: ""
+          pr-comment: >
+            Pull Request closed and locked due to lack of activity.
+
+            If you'd like to build on this closed PR, you can clone it using
+            this method: https://stackoverflow.com/a/14969986
+
+            Then open a new PR, referencing this closed PR in your message.
diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index ac66ec0d89..8e582a3113 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -23,7 +23,7 @@ concurrency:
 
 jobs:
   commitlint:
-    runs-on: ubuntu-22.04
+    runs-on: starkware-ubuntu-latest-small
     steps:
       - uses: actions/checkout@v4
         with:
@@ -117,7 +117,6 @@ jobs:
           python3 -m venv ci
           ci/bin/pip install -r scripts/requirements.txt
           ci/bin/python scripts/run_tests.py --changes_only --commit_id ${{ github.event.pull_request.base.sha }}
-          ci/bin/python scripts/run_tests.py --changes_only --concurrency --commit_id ${{ github.event.pull_request.base.sha }}
         env:
           SEED: 0
 
@@ -128,7 +127,6 @@ jobs:
           python3 -m venv ci
           ci/bin/pip install -r scripts/requirements.txt
           ci/bin/python scripts/run_tests.py
-          ci/bin/python scripts/run_tests.py --concurrency
         env:
           SEED: 0
 
diff --git a/.github/workflows/merge_paths_ci.yml b/.github/workflows/merge_paths_ci.yml
index e9c731f719..a1efb2ef34 100644
--- a/.github/workflows/merge_paths_ci.yml
+++ b/.github/workflows/merge_paths_ci.yml
@@ -23,7 +23,7 @@ concurrency:
 
 jobs:
   merge-paths-test:
-    runs-on: ubuntu-22.04
+    runs-on: starkware-ubuntu-latest-small
     steps:
       - uses: actions/checkout@v4
       - uses: actions/setup-python@v5
diff --git a/.github/workflows/papyrus/helm-install.yml b/.github/workflows/papyrus/helm-install.yml
index 280bb54b53..886f307f09 100644
--- a/.github/workflows/papyrus/helm-install.yml
+++ b/.github/workflows/papyrus/helm-install.yml
@@ -14,7 +14,7 @@ on:
 
 jobs:
   deploy-teardown:
-    runs-on: ubuntu-22.04
+    runs-on: starkware-ubuntu-latest-small
     permissions:
       contents: "read"
       id-token: "write"
diff --git a/.github/workflows/papyrus_benchmark.yaml b/.github/workflows/papyrus_benchmark.yaml
index 6a1a4edede..b7912e4957 100644
--- a/.github/workflows/papyrus_benchmark.yaml
+++ b/.github/workflows/papyrus_benchmark.yaml
@@ -8,7 +8,7 @@ on:
 
 jobs:
   storage-benchmark:
-    runs-on: ubuntu-22.04
+    runs-on: ubuntu-latest
     permissions:
       contents: "write"
       id-token: "write"
diff --git a/.github/workflows/papyrus_ci.yml b/.github/workflows/papyrus_ci.yml
index fc33c1eaec..6a2775aca6 100644
--- a/.github/workflows/papyrus_ci.yml
+++ b/.github/workflows/papyrus_ci.yml
@@ -4,15 +4,15 @@ on:
   push:
     branches: [main]
     paths:
-      - ".github/workflows/papyrus_ci.yml"
-      - "Dockerfile"
-      - "papyrus_utilities.Dockerfile"
-      - "Cargo.toml"
-      - "Cargo.lock"
-      - "crates/papyrus**/**"
-      - "crates/sequencing/**"
-      - "crates/starknet_client/**"
-      - "scripts/dependencies.sh"
+      - '.github/workflows/papyrus_ci.yml'
+      - 'Dockerfile'
+      - 'papyrus_utilities.Dockerfile'
+      - 'Cargo.toml'
+      - 'Cargo.lock'
+      - 'crates/papyrus**/**'
+      - 'crates/sequencing/**'
+      - 'crates/starknet_client/**'
+      - 'scripts/dependencies.sh'
 
   pull_request:
     types:
@@ -22,15 +22,15 @@ on:
       - auto_merge_enabled
       - edited # for when the PR title is edited
     paths:
-      - ".github/workflows/papyrus_ci.yml"
-      - "Dockerfile"
-      - "papyrus_utilities.Dockerfile"
-      - "Cargo.toml"
-      - "Cargo.lock"
-      - "crates/papyrus**/**"
-      - "crates/sequencing/**"
-      - "crates/starknet_client/**"
-      - "scripts/dependencies.sh"
+      - '.github/workflows/papyrus_ci.yml'
+      - 'Dockerfile'
+      - 'papyrus_utilities.Dockerfile'
+      - 'Cargo.toml'
+      - 'Cargo.lock'
+      - 'crates/papyrus**/**'
+      - 'crates/sequencing/**'
+      - 'crates/starknet_client/**'
+      - 'scripts/dependencies.sh'
 
   merge_group:
     types: [checks_requested]
@@ -42,7 +42,7 @@ concurrency:
 
 jobs:
   executable-run:
-    runs-on: ubuntu-22.04
+    runs-on: starkware-ubuntu-latest-medium
     steps:
       - uses: actions/checkout@v4
       - uses: ./.github/actions/bootstrap
@@ -57,7 +57,7 @@ jobs:
           & sleep 30 ; kill $!
 
   executable-run-no-rpc:
-    runs-on: ubuntu-22.04
+    runs-on: starkware-ubuntu-latest-medium
     steps:
       - uses: actions/checkout@v4
       - uses: ./.github/actions/bootstrap
@@ -72,7 +72,7 @@ jobs:
           & sleep 30 ; kill $!
 
   p2p-sync-e2e-test:
-    runs-on: ubuntu-22.04
+    runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
       - uses: ./.github/actions/bootstrap
@@ -84,7 +84,7 @@ jobs:
         run: scripts/papyrus/p2p_sync_e2e_test/main.sh ${{ secrets.CI_BASE_LAYER_NODE_URL }}
 
   integration-test:
-    runs-on: ubuntu-22.04
+    runs-on: starkware-ubuntu-latest-medium
     steps:
       - uses: actions/checkout@v4
       - uses: ./.github/actions/bootstrap
@@ -97,7 +97,7 @@ jobs:
           cargo run -r -p papyrus_node --bin central_source_integration_test --features="futures-util tokio-stream"
 
   test-no-rpc:
-    runs-on: ubuntu-22.04
+    runs-on: starkware-ubuntu-latest-medium
     steps:
       - uses: actions/checkout@v4
       - uses: ./.github/actions/bootstrap
@@ -107,7 +107,7 @@ jobs:
           SEED: 0
 
   check-starknet_api-dependency:
-    runs-on: ubuntu-22.04
+    runs-on: starkware-ubuntu-latest-small
     if: github.base_ref == 'main' # this step is only run if the pr is to the main branch
     steps:
       - uses: actions/checkout@v4
@@ -115,7 +115,7 @@ jobs:
       - run: ./check_starknet_api_version_dependency.sh # this script checks that if the starknet_api dependency is by git rev then this rev (commit) is on main
 
   build-papyrus-utilities-image:
-    runs-on: ubuntu-22.04
+    runs-on: starkware-ubuntu-latest-medium
     steps:
       - uses: actions/checkout@v4
       - name: Set up Docker Buildx
@@ -131,7 +131,7 @@ jobs:
           cache-to: type=gha,mode=max,scope=buildkit-ci
 
   random-table-test:
-    runs-on: ubuntu-22.04
+    runs-on: starkware-ubuntu-latest-medium
     steps:
       - uses: actions/checkout@v4
       # run this job only if the path 'crates/papyrus_storage/src/db/**' is changed, because it takes around 2 minutes.
diff --git a/.github/workflows/verify-deps.yml b/.github/workflows/verify-deps.yml
index a918e4ce3e..8582cb1b6b 100644
--- a/.github/workflows/verify-deps.yml
+++ b/.github/workflows/verify-deps.yml
@@ -2,12 +2,12 @@ name: Nightly Latest Dependencies Check
 
 on:
   schedule:
-    - cron: "0 0 * * *" # Runs at 00:00 UTC every day
+    - cron: '0 0 * * *' # Runs at 00:00 UTC every day
 
 jobs:
   latest_deps:
     name: Latest Dependencies
-    runs-on: ubuntu-22.04
+    runs-on: starkware-ubuntu-latest-medium
     continue-on-error: true
     steps:
       - uses: actions/checkout@v4