diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 5801e2a19..62c03c64d 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -8,6 +8,9 @@ on:
   pull_request:
     branches: [ master ]
 
+env:
+  PYTEST_ADDOPTS: "--cov=numpyro"
+
 jobs:
   lint:
 
@@ -69,7 +72,6 @@ jobs:
         pip install https://github.com/pyro-ppl/funsor/archive/master.zip
         pip install .[dev,test]
         pip freeze
-        export PYTEST_ADDOPTS="--cov"
     - name: Test with pytest
       run: |
         CI=1 pytest -vs -k "not test_example" --durations=100 --ignore=test/infer/ --ignore=test/contrib/
@@ -107,7 +109,6 @@ jobs:
         pip install https://github.com/pyro-ppl/funsor/archive/master.zip
         pip install .[dev,test]
         pip freeze
-        export PYTEST_ADDOPTS="--cov=numpyro"
     - name: Test with pytest
       run: |
         pytest -vs --durations=20 test/infer/test_mcmc.py
@@ -157,7 +158,6 @@ jobs:
         pip install https://github.com/pyro-ppl/funsor/archive/master.zip
         pip install .[dev,examples,test]
         pip freeze
-        export PYTEST_ADDOPTS="--cov=numpyro"
     - name: Test with pytest
       run: |
         CI=1 XLA_FLAGS="--xla_force_host_platform_device_count=2" pytest -vs -k test_example