diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index e8181f82a..2b6e0eef1 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -44,8 +44,10 @@ jobs:
         # Preserves .tox directory between runs for faster installs
         uses: actions/cache@v2
         with:
-          path: .tox
-          key: v2-build-tox-cache-${{ env.RUN_MATRIX_COMBINATION }}-${{ hashFiles('tox.ini', 'gen-requirements.txt', 'dev-requirements.txt') }}
+          path: |
+            .tox
+            ~/.cache/pip
+          key: v4-build-tox-cache-${{ env.RUN_MATRIX_COMBINATION }}-${{ hashFiles('tox.ini', 'gen-requirements.txt', 'dev-requirements.txt') }}
       - name: run tox
         run: tox -f ${{ matrix.python-version }}-${{ matrix.package }} -- --benchmark-json=${{ env.RUN_MATRIX_COMBINATION }}-benchmark.json
       - name: Find and merge benchmarks
@@ -94,12 +96,17 @@ jobs:
           python-version: 3.9
       - name: Install tox
         run: pip install -U tox
+      - name: Install libsnappy-dev
+        if: ${{ matrix.tox-environment == 'lint' }}
+        run: sudo apt-get install -y libsnappy-dev
       - name: Cache tox environment
         # Preserves .tox directory between runs for faster installs
         uses: actions/cache@v2
         with:
-          path: .tox
-          key: v2-misc-tox-cache-${{ matrix.tox-environment }}-${{ hashFiles('tox.ini', 'dev-requirements.txt', 'gen-requirements.txt', 'docs-requirements.txt') }}
+          path: |
+            .tox
+            ~/.cache/pip
+          key: v4-misc-tox-cache-${{ matrix.tox-environment }}-${{ hashFiles('tox.ini', 'dev-requirements.txt', 'gen-requirements.txt', 'docs-requirements.txt') }}
       - name: run tox
         run: tox -e ${{ matrix.tox-environment }}
       - name: Ensure generated code is up to date
diff --git a/.python-version b/.python-version
new file mode 100644
index 000000000..11aaa0686
--- /dev/null
+++ b/.python-version
@@ -0,0 +1 @@
+3.9.5
diff --git a/dev-requirements.txt b/dev-requirements.txt
index 75b9ed793..2bb9e3214 100644
--- a/dev-requirements.txt
+++ b/dev-requirements.txt
@@ -1,4 +1,4 @@
-pylint~=2.6
+pylint<2.10
 flake8~=3.7
 isort~=5.6
 black>=19.3b0,==19.*
diff --git a/tox.ini b/tox.ini
index ddb892930..50fca6d6b 100644
--- a/tox.ini
+++ b/tox.ini
@@ -345,7 +345,6 @@ deps =
   httpretty
 
 commands_pre =
-  sudo apt-get install libsnappy-dev
   python -m pip install {toxinidir}/opentelemetry-python-core/opentelemetry-api
   python -m pip install {toxinidir}/opentelemetry-python-core/opentelemetry-semantic-conventions
   python -m pip install {toxinidir}/opentelemetry-python-core/opentelemetry-instrumentation[test]