diff --git a/test/test_utils.py b/test/test_utils.py
index b0b5325..7c07d49 100644
--- a/test/test_utils.py
+++ b/test/test_utils.py
@@ -1,10 +1,16 @@
 from rl_portfolio_management.data.utils import random_shift, normalize, scale_to_start
-from rl_portfolio_management.util import sharpe, MDD
+from rl_portfolio_management.util import sharpe, MDD, softmax
 
 import pandas as pd
 import numpy as np
 
 
+def test_softmax():
+    x = np.random.random((20, 20))
+    y = softmax(x)
+    np.testing.assert_almost_equal(y.sum(), 1)
+
+
 def test_maxdrawdown():
     assert MDD(np.array([0, 0, 0, 0, 1, 2, 3])) == 0
     assert MDD(np.array([0, 0, 0, 0, 1, 2, 1])) == -1
diff --git a/test/test_wrappers.py b/test/test_wrappers.py
new file mode 100644
index 0000000..460efd5
--- /dev/null
+++ b/test/test_wrappers.py
@@ -0,0 +1,24 @@
+import gym
+
+from rl_portfolio_management.environments import PortfolioEnv, env_specs
+from rl_portfolio_management.wrappers import ConcatStates, SoftmaxActions
+
+
+def test_concat():
+    env = gym.make("CryptoPortfolioEIIE-v0")
+    env = ConcatStates(env)
+    obs = env.reset()
+    assert len(obs.shape) == 3
+    action = env.action_space.sample()
+    action /= action.sum()
+    obs, rew, done, info = env.step(action)
+    assert len(obs.shape) == 3
+
+
+def test_softmax():
+    env = gym.make("CryptoPortfolioEIIE-v0")
+    env = SoftmaxActions(env)
+    obs = env.reset()
+    # should be no problem with actions that don't sum to one
+    action = env.action_space.sample() * 100
+    obs, rew, done, info = env.step(action)