diff --git a/.travis.yml b/.travis.yml
index a9896da..3475db4 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -16,6 +16,8 @@ branches:
 # the main build
 script:
   - |
+      cargo build -v --no-default-features &&
+      cargo test -v --no-default-features &&
       cargo build -v --features=$FEATURES &&
       cargo test -v --features=$FEATURES &&
       if [[ "$TRAVIS_RUST_VERSION" == "nightly" ]]; then
diff --git a/src/algorithms.rs b/src/algorithms.rs
index c0ecb10..5d65486 100644
--- a/src/algorithms.rs
+++ b/src/algorithms.rs
@@ -468,6 +468,7 @@ pub fn merge_internal_ranges<T: Ord>(data: &mut [T], left_end: usize, buffer: &m
     Ok(())
 }
 
+#[cfg(feature="use_std")]
 #[test]
 fn test_merge_internal() {
     let mut buffer = [0; 128];
diff --git a/src/container.rs b/src/container.rs
index 3fcdbcf..7d36aac 100644
--- a/src/container.rs
+++ b/src/container.rs
@@ -660,7 +660,7 @@ fn intervals() {
         for elt in &mut arr[r] {
             *elt += 1;
         }
-        println!("{:?}", &mut arr[r]);
+        // println!("{:?}", &mut arr[r]);
     });
 }
 
diff --git a/tests/vec.rs b/tests/vec.rs
index 64b7ee4..4277245 100644
--- a/tests/vec.rs
+++ b/tests/vec.rs
@@ -1,3 +1,4 @@
+#![cfg(feature="use_std")]
 
 extern crate indexing;