diff --git a/.github/workflows/pull-request-token-lending.yml b/.github/workflows/pull-request-token-lending.yml
index 38bae044d13..2113caffdc0 100644
--- a/.github/workflows/pull-request-token-lending.yml
+++ b/.github/workflows/pull-request-token-lending.yml
@@ -13,7 +13,7 @@ on:
 
 jobs:
   cargo-test-bpf:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-latest-16-cores
     steps:
       - uses: actions/checkout@v2
 
diff --git a/.github/workflows/pull-request.yml b/.github/workflows/pull-request.yml
index cea10a574cf..1c87de57f64 100644
--- a/.github/workflows/pull-request.yml
+++ b/.github/workflows/pull-request.yml
@@ -79,7 +79,7 @@ jobs:
           args: --workspace --all-targets -- --deny=warnings
 
   cargo-build-test:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-latest-16-cores
     steps:
       - uses: actions/checkout@v2
 
@@ -126,7 +126,7 @@ jobs:
         run: ./ci/cargo-build-test.sh
 
   cargo-coverage:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-latest-16-cores
     steps:
       - uses: actions/checkout@v2