diff --git a/src/tests.rs b/src/tests.rs
index 3ad2615..4576739 100644
--- a/src/tests.rs
+++ b/src/tests.rs
@@ -1,64 +1,88 @@
 
 #![cfg(test)]
 
-mod tests {
+use crypto::sha3::Sha3;
 
-    use crypto::sha3::Sha3;
+use MerkleTree;
+use MerkleDigest;
+use Hashable;
 
-    use MerkleTree;
-    use MerkleDigest;
-    use Hashable;
-
-    #[test]
-    fn test_from_vec3() {
-        let mut digest = Sha3::sha3_256();
-
-        let values = vec![1, 2, 3];
-        let hashes = vec![
-            digest.hash_bytes(&1.to_bytes()),
-            digest.hash_bytes(&2.to_bytes()),
-            digest.hash_bytes(&3.to_bytes())
-        ];
-
-        let tree = MerkleTree::from_vec(digest, values);
-
-        let mut d     = Sha3::sha3_256();
-        let h01       = &d.combine_hashes(&hashes[0], &hashes[1]);
-        let h2        = &hashes[2];
-        let root_hash = &d.combine_hashes(h01, h2);
-
-        assert_eq!(tree.count, 3);
-        assert_eq!(tree.height, 2);
-        assert_eq!(tree.root_hash().as_slice(), root_hash.as_slice());
-    }
-
-    #[test]
-    fn test_from_vec9() {
-        let mut digest = Sha3::sha3_256();
-
-        let values = vec![1, 2, 3, 4, 5, 6, 7, 8, 9];
-        let hashes = values.clone().iter().map(|v| digest.hash_bytes(&v.to_bytes())).collect::<Vec<_>>();
-        let count  = values.len();
-
-        let tree = MerkleTree::from_vec(digest, values);
-
-        let mut d = Sha3::sha3_256();
-
-        let h01   = &d.combine_hashes(&hashes[0], &hashes[1]);
-        let h23   = &d.combine_hashes(&hashes[2], &hashes[3]);
-        let h45   = &d.combine_hashes(&hashes[4], &hashes[5]);
-        let h67   = &d.combine_hashes(&hashes[6], &hashes[7]);
-        let h8    = &hashes[8];
-        let h0123 = &d.combine_hashes(h01, h23);
-        let h4567 = &d.combine_hashes(h45, h67);
-        let h1to7 = &d.combine_hashes(h0123, h4567);
-
-        let root_hash = &d.combine_hashes(h1to7, h8);
-
-        assert_eq!(tree.count, count);
-        assert_eq!(tree.height, 4);
-        assert_eq!(tree.root_hash().as_slice(), root_hash.as_slice());
-    }
+#[test]
+#[should_panic]
+fn test_from_vec_empty() {
+    let digest          = Sha3::sha3_256();
+    let values: Vec<u8> = vec![];
 
+    MerkleTree::from_vec(digest, values);
+}
+
+#[test]
+fn test_from_vec1() {
+    let digest = Sha3::sha3_256();
+
+    let values = vec!["hello, world".to_string()];
+    let tree = MerkleTree::from_vec(digest, values);
+
+    let mut d = Sha3::sha3_256();
+
+    let root_hash = &d.hash_bytes(&"hello, world".to_string().to_bytes());
+
+    assert_eq!(tree.count, 1);
+    assert_eq!(tree.height, 1);
+    assert_eq!(tree.root_hash().as_slice(), root_hash.as_slice());
+}
+
+
+#[test]
+fn test_from_vec3() {
+    let digest = Sha3::sha3_256();
+
+    let values = vec![1, 2, 3];
+    let tree = MerkleTree::from_vec(digest, values);
+
+    let mut d = Sha3::sha3_256();
+
+    let hashes = vec![
+        d.hash_bytes(&1.to_bytes()),
+        d.hash_bytes(&2.to_bytes()),
+        d.hash_bytes(&3.to_bytes())
+    ];
+
+    let h01       = &d.combine_hashes(&hashes[0], &hashes[1]);
+    let h2        = &hashes[2];
+    let root_hash = &d.combine_hashes(h01, h2);
+
+    assert_eq!(tree.count, 3);
+    assert_eq!(tree.height, 2);
+    assert_eq!(tree.root_hash().as_slice(), root_hash.as_slice());
+}
+
+#[test]
+fn test_from_vec9() {
+    let digest = Sha3::sha3_256();
+
+    let values = vec![1, 2, 3, 4, 5, 6, 7, 8, 9];
+    let count  = values.len();
+
+    let tree = MerkleTree::from_vec(digest, values.clone());
+
+    let mut d = Sha3::sha3_256();
+
+    let hashes = values.iter().map(|v| d.hash_bytes(&v.to_bytes())).collect::<Vec<_>>();
+
+    let h01   = &d.combine_hashes(&hashes[0], &hashes[1]);
+    let h23   = &d.combine_hashes(&hashes[2], &hashes[3]);
+    let h45   = &d.combine_hashes(&hashes[4], &hashes[5]);
+    let h67   = &d.combine_hashes(&hashes[6], &hashes[7]);
+    let h8    = &hashes[8];
+    let h0123 = &d.combine_hashes(h01, h23);
+    let h4567 = &d.combine_hashes(h45, h67);
+    let h1to7 = &d.combine_hashes(h0123, h4567);
+
+    let root_hash = &d.combine_hashes(h1to7, h8);
+
+    assert_eq!(tree.count, count);
+    assert_eq!(tree.height, 4);
+    assert_eq!(tree.root_hash().as_slice(), root_hash.as_slice());
 }