diff --git a/.travis.yml b/.travis.yml
index 05e255e..4616538 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -26,70 +26,10 @@ jobs:
       script: cargo check --all-targets
       rust: stable
       os: linux
-    - <<: *check
-      rust: 1.0.0
-    - <<: *check
-      rust: 1.1.0
-    - <<: *check
-      rust: 1.2.0
-    - <<: *check
-      rust: 1.3.0
-    - <<: *check
-      rust: 1.4.0
-    - <<: *check
-      rust: 1.5.0
-    - <<: *check
-      rust: 1.6.0
-    - <<: *check
-      rust: 1.7.0
-    - <<: *check
-      rust: 1.8.0
-    - <<: *check
-      rust: 1.0.0
-    - <<: *check
-      rust: 1.10.0
-    - <<: *check
-      rust: 1.11.0
-    - <<: *check
-      rust: 1.12.1
-    - <<: *check
-      rust: 1.13.0
-    - <<: *check
-      rust: 1.14.0
-    - <<: *check
-      rust: 1.15.1
-    - <<: *check
-      rust: 1.16.0
-    - <<: *check
-      rust: 1.17.0
-    - <<: *check
-      rust: 1.18.0
-    - <<: *check
-      rust: 1.19.0
-    - <<: *check
-      rust: 1.20.0
-    - <<: *check
-      rust: 1.21.0
-    - <<: *check
-      rust: 1.22.1
-    - <<: *check
-      rust: 1.23.0
-    - <<: *check
-      rust: 1.24.1
-    - <<: *check
-      rust: 1.25.0
-    - <<: *check
+      # <1.24 doesn't work because of lazy-static 1.2.0
+      # <1.26.2 doesn't work because of nom 4.1.1
+    - <<: *check # also test oldest known-good stable
       rust: 1.26.2
-    - <<: *check
-      rust: 1.27.2
-    - <<: *check
-      rust: 1.28.0
-    - <<: *check
-      rust: 1.29.2
-    - <<: *check
-      rust: 1.30.1
-    - <<: *check
-      rust: 1.31.0
     - stage: test
       rust: stable
       os: osx