diff --git a/travis.sh b/travis.sh
index dc98ca44ae58..4df12613fb83 100755
--- a/travis.sh
+++ b/travis.sh
@@ -17,6 +17,8 @@ echo
 # Test
 function run_tests {
     ./miri test
+    # "miri test" has built the sysroot for us, now this should pass without
+    # any interactive questions.
     test-cargo-miri/run-test.py
 }