diff --git a/.travis.yml b/.travis.yml
index 51a471c4..ae7d67d9 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -15,4 +15,4 @@ before_install:
 script:
 - (test $TRAVIS_OS_NAME != "osx" || (cd openssl && cargo test))
 - (test $TRAVIS_OS_NAME == "osx" || (cd openssl && OPENSSL_LIB_DIR=$HOME/openssl/lib OPENSSL_INCLUDE_DIR=$HOME/openssl/include LD_LIBRARY_PATH=$HOME/openssl/lib:$LD_LIBRARY_PATH cargo test))
-- (test $TRAVIS_OS_NAME == "osx" || (cd openssl && OPENSSL_LIB_DIR=$HOME/openssl/lib OPENSSL_INCLUDE_DIR=$HOME/openssl/include LD_LIBRARY_PATH=$HOME/openssl/lib:$LD_LIBRARY_PATH cargo test --features "$FEATURES"))
+- (test $TRAVIS_OS_NAME == "osx" || (cd openssl && OPENSSL_LIB_DIR=$HOME/openssl/lib OPENSSL_INCLUDE_DIR=$HOME/openssl/include LD_LIBRARY_PATH=$HOME/openssl/lib:$LD_LIBRARY_PATH RUST_TEST_THREADS=1 cargo test --features "$FEATURES"))