diff --git a/mindspore/nn/probability/distribution/_utils/__init__.py b/mindspore/nn/probability/distribution/_utils/__init__.py
index f9cd3d3c2e..68586ae4fd 100644
--- a/mindspore/nn/probability/distribution/_utils/__init__.py
+++ b/mindspore/nn/probability/distribution/_utils/__init__.py
@@ -17,11 +17,14 @@ Distribution operation utility functions.
 """
 from .utils import *
 
-__all__ = ['convert_to_batch',
-           'cast_to_tensor',
-           'check_greater',
-           'check_greater_equal_zero',
-           'check_greater_zero',
-           'calc_broadcast_shape_from_param',
-           'check_scalar_from_param',
-           'check_prob']
+__all__ = [
+    'convert_to_batch',
+    'cast_to_tensor',
+    'check_greater',
+    'check_greater_equal_zero',
+    'check_greater_zero',
+    'calc_broadcast_shape_from_param',
+    'check_scalar_from_param',
+    'check_prob',
+    'check_type',
+]
diff --git a/mindspore/nn/probability/distribution/_utils/utils.py b/mindspore/nn/probability/distribution/_utils/utils.py
index aeccfc2b8f..2c11106be5 100644
--- a/mindspore/nn/probability/distribution/_utils/utils.py
+++ b/mindspore/nn/probability/distribution/_utils/utils.py
@@ -1,4 +1,3 @@
-
 # Copyright 2020 Huawei Technologies Co., Ltd
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
@@ -23,7 +22,7 @@ from mindspore.ops import operations as P
 from mindspore.ops import composite as C
 import mindspore.nn as nn
 
-def cast_to_tensor(t, dtype=mstype.float32):
+def cast_to_tensor(t, hint_dtype=mstype.float32):
     """
     Cast an user input value into a Tensor of dtype.
     If the input t is of type Parameter, t is directly returned as a Parameter.
@@ -41,25 +40,26 @@ def cast_to_tensor(t, dtype=mstype.float32):
     if isinstance(t, Parameter):
         return t
     if isinstance(t, Tensor):
+        if t.dtype != hint_dtype:
+            raise TypeError(f"Input tensor should be type {hint_dtype}.")
         #check if the Tensor in shape of Tensor(4)
         if t.dim() == 0:
             value = t.asnumpy()
-            return Tensor([t], dtype=dtype)
+            return Tensor([value], dtype=hint_dtype)
         #convert the type of tensor to dtype
-        t.set_dtype(dtype)
         return t
     if isinstance(t, (list, np.ndarray)):
-        return Tensor(t, dtype=dtype)
+        return Tensor(t, dtype=hint_dtype)
     if np.isscalar(t):
-        return Tensor([t], dtype=dtype)
+        return Tensor([t], dtype=hint_dtype)
     raise RuntimeError("Input type is not supported.")
 
-def convert_to_batch(t, batch_shape, dtype):
+def convert_to_batch(t, batch_shape, hint_dtype):
     """
     Convert a Tensor to a given batch shape.
 
     Args:
-        t (Tensor, Parameter): Tensor to be converted.
+        t (int, float, list, numpy.ndarray, Tensor, Parameter): Tensor to be converted.
         batch_shape (tuple): desired batch shape.
         dtype (mindspore.dtype): desired dtype.
 
@@ -71,9 +71,8 @@ def convert_to_batch(t, batch_shape, dtype):
     """
     if isinstance(t, Parameter):
         return t
-    if isinstance(t, Tensor):
-        return Tensor(np.broadcast_to(t.asnumpy(), batch_shape), dtype=dtype)
-    return Tensor(np.broadcast_to(t, batch_shape), dtype=dtype)
+    t = cast_to_tensor(t, hint_dtype)
+    return Tensor(np.broadcast_to(t.asnumpy(), batch_shape), dtype=hint_dtype)
 
 def check_scalar_from_param(params):
     """
@@ -85,6 +84,8 @@ def check_scalar_from_param(params):
     Notes: String parameters are excluded.
     """
     for value in params.values():
+        if isinstance(value, (nn.probability.bijector.Bijector, nn.probability.distribution.Distribution)):
+            return params['distribution'].is_scalar_batch
         if isinstance(value, Parameter):
             return False
         if isinstance(value, (str, type(params['dtype']))):
@@ -108,6 +109,8 @@ def calc_broadcast_shape_from_param(params):
     """
     broadcast_shape = []
     for value in params.values():
+        if isinstance(value, (nn.probability.bijector.Bijector, nn.probability.distribution.Distribution)):
+            return params['distribution'].broadcast_shape
         if isinstance(value, (str, type(params['dtype']))):
             continue
         if value is None:
@@ -251,3 +254,7 @@ def check_tensor_type(name, inputs, valid_type):
     inputs = P.DType()(inputs)
     if inputs not in valid_type:
         raise TypeError(f"{name} dtype is invalid")
+
+def check_type(data_type, value_type, name):
+    if not data_type in value_type:
+        raise TypeError(f"For {name}, valid type include {value_type}, {data_type} is invalid")
diff --git a/mindspore/nn/probability/distribution/bernoulli.py b/mindspore/nn/probability/distribution/bernoulli.py
index 0aaeabf9a2..31253259e5 100644
--- a/mindspore/nn/probability/distribution/bernoulli.py
+++ b/mindspore/nn/probability/distribution/bernoulli.py
@@ -16,7 +16,7 @@
 from mindspore.common import dtype as mstype
 from mindspore.ops import operations as P
 from .distribution import Distribution
-from ._utils.utils import cast_to_tensor, check_prob
+from ._utils.utils import cast_to_tensor, check_prob, check_type
 
 class Bernoulli(Distribution):
     """
@@ -95,13 +95,14 @@ class Bernoulli(Distribution):
         Constructor of Bernoulli distribution.
         """
         param = dict(locals())
-        super(Bernoulli, self).__init__(dtype, name, param)
+        valid_dtype = mstype.int_type + mstype.uint_type
+        check_type(dtype, valid_dtype, "Bernoulli")
+        super(Bernoulli, self).__init__(seed, dtype, name, param)
         if probs is not None:
-            self._probs = cast_to_tensor(probs, dtype=mstype.float32)
+            self._probs = cast_to_tensor(probs, hint_dtype=mstype.float32)
             check_prob(self.probs)
         else:
             self._probs = probs
-        self.seed = seed
 
         # ops needed for the class
         self.cast = P.Cast()
@@ -231,8 +232,8 @@ class Bernoulli(Distribution):
             probs1_a (Tensor): probs1 of distribution a. Default: self.probs.
 
         .. math::
-            KL(a||b) = probs1_a * \log(\fract{probs1_a}{probs1_b}) +
-                       probs0_a * \log(\fract{probs0_a}{probs0_b})
+            KL(a||b) = probs1_a * \log(\frac{probs1_a}{probs1_b}) +
+                       probs0_a * \log(\frac{probs0_a}{probs0_b})
         """
         if dist == 'Bernoulli':
             probs1_a = self.probs if probs1_a is None else probs1_a
diff --git a/mindspore/nn/probability/distribution/distribution.py b/mindspore/nn/probability/distribution/distribution.py
index 90ad66292d..d3e7d3ccd9 100644
--- a/mindspore/nn/probability/distribution/distribution.py
+++ b/mindspore/nn/probability/distribution/distribution.py
@@ -14,6 +14,7 @@
 # ============================================================================
 """basic"""
 from mindspore.nn.cell import Cell
+from mindspore._checkparam import Validator as validator
 from ._utils.utils import calc_broadcast_shape_from_param, check_scalar_from_param
 
 class Distribution(Cell):
@@ -38,6 +39,7 @@ class Distribution(Cell):
         original distribuion.
     """
     def __init__(self,
+                 seed,
                  dtype,
                  name,
                  param):
@@ -46,7 +48,11 @@ class Distribution(Cell):
         Constructor of distribution class.
         """
         super(Distribution, self).__init__()
+        validator.check_value_type('name', name, [str], 'distribution_name')
+        validator.check_value_type('seed', seed, [int], name)
+
         self._name = name
+        self._seed = seed
         self._dtype = dtype
         self._parameters = {}
         # parsing parameters
@@ -77,6 +83,10 @@ class Distribution(Cell):
     def dtype(self):
         return self._dtype
 
+    @property
+    def seed(self):
+        return self._seed
+
     @property
     def parameters(self):
         return self._parameters
@@ -85,6 +95,10 @@ class Distribution(Cell):
     def is_scalar_batch(self):
         return self._is_scalar_batch
 
+    @property
+    def broadcast_shape(self):
+        return self._broadcast_shape
+
     def _set_prob(self):
         """
         Set probability funtion based on the availability of _prob and _log_likehood.
diff --git a/mindspore/nn/probability/distribution/exponential.py b/mindspore/nn/probability/distribution/exponential.py
index 74c6a40ab0..6f15958f95 100644
--- a/mindspore/nn/probability/distribution/exponential.py
+++ b/mindspore/nn/probability/distribution/exponential.py
@@ -17,7 +17,7 @@ import numpy as np
 from mindspore.ops import operations as P
 from mindspore.common import dtype as mstype
 from .distribution import Distribution
-from ._utils.utils import cast_to_tensor, check_greater_zero
+from ._utils.utils import cast_to_tensor, check_greater_zero, check_type
 
 class Exponential(Distribution):
     """
@@ -96,9 +96,11 @@ class Exponential(Distribution):
         Constructor of Exponential distribution.
         """
         param = dict(locals())
-        super(Exponential, self).__init__(dtype, name, param)
+        valid_dtype = mstype.float_type
+        check_type(dtype, valid_dtype, "Exponential")
+        super(Exponential, self).__init__(seed, dtype, name, param)
         if rate is not None:
-            self._rate = cast_to_tensor(rate, mstype.float32)
+            self._rate = cast_to_tensor(rate, dtype)
             check_greater_zero(self._rate, "rate")
         else:
             self._rate = rate
@@ -135,7 +137,7 @@ class Exponential(Distribution):
     def _mean(self, rate=None):
         r"""
         .. math::
-            MEAN(EXP) = \fract{1.0}{\lambda}.
+            MEAN(EXP) = \frac{1.0}{\lambda}.
         """
         rate = self.rate if rate is None else rate
         return 1.0 / rate
@@ -152,7 +154,7 @@ class Exponential(Distribution):
     def _sd(self, rate=None):
         r"""
         .. math::
-            sd(EXP) = \fract{1.0}{\lambda}.
+            sd(EXP) = \frac{1.0}{\lambda}.
         """
         rate = self.rate if rate is None else rate
         return 1.0 / rate
diff --git a/mindspore/nn/probability/distribution/geometric.py b/mindspore/nn/probability/distribution/geometric.py
index 59bc8f0c99..87ad7ad8a4 100644
--- a/mindspore/nn/probability/distribution/geometric.py
+++ b/mindspore/nn/probability/distribution/geometric.py
@@ -17,7 +17,7 @@ import numpy as np
 from mindspore.ops import operations as P
 from mindspore.common import dtype as mstype
 from .distribution import Distribution
-from ._utils.utils import cast_to_tensor, check_prob
+from ._utils.utils import cast_to_tensor, check_prob, check_type
 
 class Geometric(Distribution):
     """
@@ -97,9 +97,11 @@ class Geometric(Distribution):
         Constructor of Geometric distribution.
         """
         param = dict(locals())
-        super(Geometric, self).__init__(dtype, name, param)
+        valid_dtype = mstype.int_type + mstype.uint_type
+        check_type(dtype, valid_dtype, "Geometric")
+        super(Geometric, self).__init__(seed, dtype, name, param)
         if probs is not None:
-            self._probs = cast_to_tensor(probs, dtype=mstype.float32)
+            self._probs = cast_to_tensor(probs, hint_dtype=mstype.float32)
             check_prob(self._probs)
         else:
             self._probs = probs
@@ -154,7 +156,7 @@ class Geometric(Distribution):
     def _var(self, probs1=None):
         r"""
         .. math::
-            VAR(Geo) = \fract{1 - probs1}{probs1 ^ {2}}
+            VAR(Geo) = \frac{1 - probs1}{probs1 ^ {2}}
         """
         probs1 = self.probs if probs1 is None else probs1
         return (1.0 - probs1) / self.sq(probs1)
@@ -162,7 +164,7 @@ class Geometric(Distribution):
     def _entropy(self, probs=None):
         r"""
         .. math::
-            H(Geo) = \fract{-1 * probs0 \log_2 (1-probs0)\ - prob1 * \log_2 (1-probs1)\ }{probs1}
+            H(Geo) = \frac{-1 * probs0 \log_2 (1-probs0)\ - prob1 * \log_2 (1-probs1)\ }{probs1}
         """
         probs1 = self.probs if probs is None else probs
         probs0 = 1.0 - probs1
@@ -244,7 +246,7 @@ class Geometric(Distribution):
             probs1_a (Tensor): probability of success of distribution a. Default: self.probs.
 
         .. math::
-            KL(a||b) = \log(\fract{probs1_a}{probs1_b}) + \fract{probs0_a}{probs1_a} * \log(\fract{probs0_a}{probs0_b})
+            KL(a||b) = \log(\frac{probs1_a}{probs1_b}) + \frac{probs0_a}{probs1_a} * \log(\frac{probs0_a}{probs0_b})
         """
         if dist == 'Geometric':
             probs1_a = self.probs if probs1_a is None else probs1_a
diff --git a/mindspore/nn/probability/distribution/normal.py b/mindspore/nn/probability/distribution/normal.py
index a984c161bf..e1dfbee89d 100644
--- a/mindspore/nn/probability/distribution/normal.py
+++ b/mindspore/nn/probability/distribution/normal.py
@@ -18,7 +18,7 @@ from mindspore.ops import operations as P
 from mindspore.ops import composite as C
 from mindspore.common import dtype as mstype
 from .distribution import Distribution
-from ._utils.utils import convert_to_batch, check_greater_equal_zero
+from ._utils.utils import convert_to_batch, check_greater_equal_zero, check_type
 
 
 class Normal(Distribution):
@@ -100,15 +100,17 @@ class Normal(Distribution):
         Constructor of normal distribution.
         """
         param = dict(locals())
-        super(Normal, self).__init__(dtype, name, param)
+        valid_dtype = mstype.float_type
+        check_type(dtype, valid_dtype, "Normal")
+        super(Normal, self).__init__(seed, dtype, name, param)
         if  mean is not None and sd is not None:
-            self._mean_value = convert_to_batch(mean, self._broadcast_shape, dtype)
-            self._sd_value = convert_to_batch(sd, self._broadcast_shape, dtype)
+            self._mean_value = convert_to_batch(mean, self.broadcast_shape, dtype)
+            self._sd_value = convert_to_batch(sd, self.broadcast_shape, dtype)
             check_greater_equal_zero(self._sd_value, "Standard deviation")
         else:
             self._mean_value = mean
             self._sd_value = sd
-        self.seed = seed
+
 
         #ops needed for the class
         self.const = P.ScalarToArray()
@@ -191,7 +193,7 @@ class Normal(Distribution):
             sd (Tensor): standard deviation the distribution. Default: self._sd_value.
 
         .. math::
-            L(x) = -1* \fract{(x - \mu)^2}{2. * \sigma^2} - \log(\sqrt(2* \pi * \sigma^2))
+            L(x) = -1* \frac{(x - \mu)^2}{2. * \sigma^2} - \log(\sqrt(2* \pi * \sigma^2))
         """
         mean = self._mean_value if mean is None else mean
         sd = self._sd_value if sd is None else sd
@@ -229,7 +231,7 @@ class Normal(Distribution):
             sd_a (Tensor): standard deviation distribution a. Default: self._sd_value.
 
         .. math::
-            KL(a||b) = 0.5 * (\fract{MEAN(a)}{STD(b)} - \fract{MEAN(b)}{STD(b)}) ^ 2 +
+            KL(a||b) = 0.5 * (\frac{MEAN(a)}{STD(b)} - \frac{MEAN(b)}{STD(b)}) ^ 2 +
                        0.5 * EXPM1(2 * (\log(STD(a)) - \log(STD(b))) - (\log(STD(a)) - \log(STD(b)))
         """
         if dist == 'Normal':
diff --git a/mindspore/nn/probability/distribution/transformed_distribution.py b/mindspore/nn/probability/distribution/transformed_distribution.py
index 37f474e943..baed5f10d1 100644
--- a/mindspore/nn/probability/distribution/transformed_distribution.py
+++ b/mindspore/nn/probability/distribution/transformed_distribution.py
@@ -14,7 +14,11 @@
 # ============================================================================
 """Transformed Distribution"""
 from mindspore.ops import operations as P
+from mindspore._checkparam import Validator as validator
+from mindspore.common import dtype as mstype
+import mindspore.nn as nn
 from .distribution import Distribution
+from ._utils.utils import check_type
 
 class TransformedDistribution(Distribution):
     """
@@ -35,12 +39,19 @@ class TransformedDistribution(Distribution):
     def __init__(self,
                  bijector,
                  distribution,
+                 dtype,
+                 seed=0,
                  name="transformed_distribution"):
         """
         Constructor of transformed_distribution class.
         """
         param = dict(locals())
-        super(TransformedDistribution, self).__init__(distribution.dtype, name, param)
+        validator.check_value_type('bijector', bijector, [nn.probability.bijector.Bijector], name)
+        validator.check_value_type('distribution', distribution, [Distribution], name)
+        valid_dtype = mstype.number_type
+        check_type(dtype, valid_dtype, "transformed_distribution")
+        super(TransformedDistribution, self).__init__(seed, dtype, name, param)
+
         self._bijector = bijector
         self._distribution = distribution
         self._is_linear_transformation = bijector.is_constant_jacobian
diff --git a/mindspore/nn/probability/distribution/uniform.py b/mindspore/nn/probability/distribution/uniform.py
index 2fc459f56d..b1f2aba90a 100644
--- a/mindspore/nn/probability/distribution/uniform.py
+++ b/mindspore/nn/probability/distribution/uniform.py
@@ -16,7 +16,7 @@
 from mindspore.ops import operations as P
 from mindspore.common import dtype as mstype
 from .distribution import Distribution
-from ._utils.utils import convert_to_batch, check_greater
+from ._utils.utils import convert_to_batch, check_greater, check_type
 
 class Uniform(Distribution):
     """
@@ -97,10 +97,12 @@ class Uniform(Distribution):
         Constructor of Uniform distribution.
         """
         param = dict(locals())
-        super(Uniform, self).__init__(dtype, name, param)
+        valid_dtype = mstype.float_type
+        check_type(dtype, valid_dtype, "Uniform")
+        super(Uniform, self).__init__(seed, dtype, name, param)
         if low is not None and high is not None:
-            self._low = convert_to_batch(low, self._broadcast_shape, dtype)
-            self._high = convert_to_batch(high, self._broadcast_shape, dtype)
+            self._low = convert_to_batch(low, self.broadcast_shape, dtype)
+            self._high = convert_to_batch(high, self.broadcast_shape, dtype)
             check_greater(self.low, self.high, "low value", "high value")
         else:
             self._low = low
@@ -156,7 +158,7 @@ class Uniform(Distribution):
     def _mean(self, low=None, high=None):
         r"""
         .. math::
-            MEAN(U) = \fract{low + high}{2}.
+            MEAN(U) = \frac{low + high}{2}.
         """
         low = self.low if low is None else low
         high = self.high if high is None else high
@@ -166,7 +168,7 @@ class Uniform(Distribution):
     def _var(self, low=None, high=None):
         r"""
         .. math::
-            VAR(U) = \fract{(high -low) ^ 2}{12}.
+            VAR(U) = \frac{(high -low) ^ 2}{12}.
         """
         low = self.low if low is None else low
         high = self.high if high is None else high
@@ -207,7 +209,7 @@ class Uniform(Distribution):
 
         .. math::
             pdf(x) = 0 if x < low;
-            pdf(x) = \fract{1.0}{high -low} if low <= x <= high;
+            pdf(x) = \frac{1.0}{high -low} if low <= x <= high;
             pdf(x) = 0 if x > high;
         """
         low = self.low if low is None else low
@@ -251,7 +253,7 @@ class Uniform(Distribution):
 
         .. math::
             cdf(x) = 0 if x < low;
-            cdf(x) = \fract{x - low}{high -low} if low <= x <= high;
+            cdf(x) = \frac{x - low}{high -low} if low <= x <= high;
             cdf(x) = 1 if x > high;
         """
         low = self.low if low is None else low
diff --git a/tests/ut/python/nn/distribution/test_bernoulli.py b/tests/ut/python/nn/distribution/test_bernoulli.py
index d34455dbe4..cecf563219 100644
--- a/tests/ut/python/nn/distribution/test_bernoulli.py
+++ b/tests/ut/python/nn/distribution/test_bernoulli.py
@@ -31,6 +31,18 @@ def test_arguments():
     b = msd.Bernoulli([0.0, 0.3, 0.5, 1.0], dtype=dtype.int32)
     assert isinstance(b, msd.Distribution)
 
+def test_type():
+    with pytest.raises(TypeError):
+        msd.Bernoulli([0.1], dtype=dtype.float32)
+
+def test_name():
+    with pytest.raises(TypeError):
+        msd.Bernoulli([0.1], name=1.0)
+
+def test_seed():
+    with pytest.raises(TypeError):
+        msd.Bernoulli([0.1], seed='seed')
+
 def test_prob():
     """
     Invalid probability.
diff --git a/tests/ut/python/nn/distribution/test_exponential.py b/tests/ut/python/nn/distribution/test_exponential.py
index 43aa428277..3452667db2 100644
--- a/tests/ut/python/nn/distribution/test_exponential.py
+++ b/tests/ut/python/nn/distribution/test_exponential.py
@@ -32,6 +32,18 @@ def test_arguments():
     e = msd.Exponential([0.1, 0.3, 0.5, 1.0], dtype=dtype.float32)
     assert isinstance(e, msd.Distribution)
 
+def test_type():
+    with pytest.raises(TypeError):
+        msd.Exponential([0.1], dtype=dtype.int32)
+
+def test_name():
+    with pytest.raises(TypeError):
+        msd.Exponential([0.1], name=1.0)
+
+def test_seed():
+    with pytest.raises(TypeError):
+        msd.Exponential([0.1], seed='seed')
+
 def test_rate():
     """
     Invalid rate.
diff --git a/tests/ut/python/nn/distribution/test_geometric.py b/tests/ut/python/nn/distribution/test_geometric.py
index b705aae781..11c12f62dc 100644
--- a/tests/ut/python/nn/distribution/test_geometric.py
+++ b/tests/ut/python/nn/distribution/test_geometric.py
@@ -32,6 +32,18 @@ def test_arguments():
     g = msd.Geometric([0.0, 0.3, 0.5, 1.0], dtype=dtype.int32)
     assert isinstance(g, msd.Distribution)
 
+def test_type():
+    with pytest.raises(TypeError):
+        msd.Geometric([0.1], dtype=dtype.float32)
+
+def test_name():
+    with pytest.raises(TypeError):
+        msd.Geometric([0.1], name=1.0)
+
+def test_seed():
+    with pytest.raises(TypeError):
+        msd.Geometric([0.1], seed='seed')
+
 def test_prob():
     """
     Invalid probability.
diff --git a/tests/ut/python/nn/distribution/test_normal.py b/tests/ut/python/nn/distribution/test_normal.py
index f569aa67a5..76602bde80 100644
--- a/tests/ut/python/nn/distribution/test_normal.py
+++ b/tests/ut/python/nn/distribution/test_normal.py
@@ -30,6 +30,17 @@ def test_normal_shape_errpr():
     with pytest.raises(ValueError):
         msd.Normal([[2.], [1.]], [[2.], [3.], [4.]], dtype=dtype.float32)
 
+def test_type():
+    with pytest.raises(TypeError):
+        msd.Normal(0., 1., dtype=dtype.int32)
+
+def test_name():
+    with pytest.raises(TypeError):
+        msd.Normal(0., 1., name=1.0)
+
+def test_seed():
+    with pytest.raises(TypeError):
+        msd.Normal(0., 1., seed='seed')
 
 def test_arguments():
     """
diff --git a/tests/ut/python/nn/distribution/test_uniform.py b/tests/ut/python/nn/distribution/test_uniform.py
index a631998e83..82af4cb38d 100644
--- a/tests/ut/python/nn/distribution/test_uniform.py
+++ b/tests/ut/python/nn/distribution/test_uniform.py
@@ -30,6 +30,17 @@ def test_uniform_shape_errpr():
     with pytest.raises(ValueError):
         msd.Uniform([[2.], [1.]], [[2.], [3.], [4.]], dtype=dtype.float32)
 
+def test_type():
+    with pytest.raises(TypeError):
+        msd.Uniform(0., 1., dtype=dtype.int32)
+
+def test_name():
+    with pytest.raises(TypeError):
+        msd.Uniform(0., 1., name=1.0)
+
+def test_seed():
+    with pytest.raises(TypeError):
+        msd.Uniform(0., 1., seed='seed')
 
 def test_arguments():
     """