[ci] back to pypy3.5 in travis

diff --git a/.travis.yml b/.travis.yml
index ad389fd..c366cf9 100644 (file)
--- a/.travis.yml
+++ b/.travis.yml
@@ -14,7 +14,7 @@ matrix:
       os: linux
     - name: "Linux Python pypy3.5"
       language: python
-      python: "pypy3"
+      python: "pypy3.5"
       os: linux
     - name: "Linux (fftw3, no other deps)"
       python: 3.8