diff --git a/.travis.yml b/.travis.yml
index c5581db..ba1b1bc 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -20,3 +20,10 @@ env:
   - SHELL=ksh TEST_SUITE=fast
   - SHELL=ksh TEST_SUITE=fast WITHOUT_CURL=1
   - SHELL=sh TEST_SUITE=slow
+  - SHELL=sh TEST_SUITE=slow WITHOUT_CURL=1
+  - SHELL=dash TEST_SUITE=slow
+  - SHELL=dash TEST_SUITE=slow WITHOUT_CURL=1
+  - SHELL=bash TEST_SUITE=slow
+  - SHELL=bash TEST_SUITE=slow WITHOUT_CURL=1
+  - SHELL=zsh TEST_SUITE=slow
+  - SHELL=zsh TEST_SUITE=slow WITHOUT_CURL=1