diff --git a/.travis.yml b/.travis.yml
index 2c5fc7e6ed..31d10e84ee 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -3,17 +3,17 @@ language: rust
 matrix:
   include:
     # NOTE used to build docs on successful merges to master
-    # - env: TARGET=x86_64-unknown-linux-gnu
+    - env: TARGET=x86_64-unknown-linux-gnu
 
-    # - env: TARGET=thumbv6m-none-eabi
-    #   if: (branch = staging OR branch = trying) OR (type = pull_request AND branch = master)
+    - env: TARGET=thumbv6m-none-eabi
+      if: (branch = staging OR branch = trying) OR (type = pull_request AND branch = master)
 
-    # - env: TARGET=thumbv7m-none-eabi
-    #   if: (branch = staging OR branch = trying) OR (type = pull_request AND branch = master)
+    - env: TARGET=thumbv7m-none-eabi
+      if: (branch = staging OR branch = trying) OR (type = pull_request AND branch = master)
 
     - env: TARGET=x86_64-unknown-linux-gnu
       rust: nightly
-      # if: (branch = staging OR branch = trying) OR (type = pull_request AND branch = master)
+      if: (branch = staging OR branch = trying) OR (type = pull_request AND branch = master)
 
     - env: TARGET=thumbv6m-none-eabi
       rust: nightly