diff --git a/.travis.yml b/.travis.yml
index f2794d051f..859fb5d049 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -31,10 +31,20 @@ env:
     - NUMPY_EXPERIMENTAL_ARRAY_FUNCTION=0
 matrix:
   include:
+    - python: "3.5"
+      env: OMP=n MPI=n PHDF5=n
+    - python: "3.6"
+      env: OMP=n MPI=n PHDF5=n
     - python: "3.7"
-      env: OMP=y MPI=n PHDF5=n DAGMC=n EVENT_BASED=y
+      env: OMP=n MPI=n PHDF5=n
     - python: "3.7"
-      env: OMP=y MPI=n PHDF5=n DAGMC=n EVENT_BASED=n
+      env: OMP=y MPI=n PHDF5=n
+    - python: "3.7"
+      env: OMP=n MPI=y PHDF5=n
+    - python: "3.7"
+      env: OMP=n MPI=y PHDF5=y
+    - python: "3.7"
+      env: OMP=y MPI=y PHDF5=y DAGMC=y
 notifications:
   webhooks: https://coveralls.io/webhook?repo_token=$COVERALLS_REPO_TOKEN
 install: