diff --git a/.travis.yml b/.travis.yml
index a780d1d5..a05f6377 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -9,13 +9,18 @@ r_github_packages:
 r_binary_packages:
   - vegan
 
-r:
-  - oldrel
-  - release
-  - devel
+matrix:
+  include:
+    - os: linux
+      r: oldrel
+    - os: linux
+      r: release
+      env: R_CODECOV=true
+    - os: linux
+      r: devel
 
 after_success:
-  - Rscript -e 'covr::codecov()'
+  - if [[ "${R_CODECOV}" ]]; then R -e 'covr::codecov()'; fi
 
 notifications:
   email: