diff --git a/graphene/types/argument.py b/graphene/types/argument.py
index 07dc1d1d..49784b10 100644
--- a/graphene/types/argument.py
+++ b/graphene/types/argument.py
@@ -18,6 +18,14 @@ class Argument(OrderedType):
         self.default_value = default_value
         self.description = description
 
+    def __eq__(self, other):
+        return isinstance(other, Argument) and (
+            self.name == other.name,
+            self.type == other.type,
+            self.default_value == other.default_value,
+            self.description == other.description
+        )
+
 
 def to_arguments(args, extra_args):
     from .unmountedtype import UnmountedType
diff --git a/graphene/types/structures.py b/graphene/types/structures.py
index 6cf0e4aa..6c9c0e7e 100644
--- a/graphene/types/structures.py
+++ b/graphene/types/structures.py
@@ -27,6 +27,13 @@ class List(Structure):
     def __str__(self):
         return '[{}]'.format(self.of_type)
 
+    def __eq__(self, other):
+        return isinstance(other, List) and (
+            self.of_type == other.of_type and
+            self.args == other.args and
+            self.kwargs == other.kwargs
+        )
+
 
 class NonNull(Structure):
     '''
@@ -49,3 +56,10 @@ class NonNull(Structure):
 
     def __str__(self):
         return '{}!'.format(self.of_type)
+
+    def __eq__(self, other):
+        return isinstance(other, NonNull) and (
+            self.of_type == other.of_type and
+            self.args == other.args and
+            self.kwargs == other.kwargs
+        )
diff --git a/graphene/types/tests/test_argument.py b/graphene/types/tests/test_argument.py
new file mode 100644
index 00000000..34ed3144
--- /dev/null
+++ b/graphene/types/tests/test_argument.py
@@ -0,0 +1,26 @@
+import pytest
+
+from ..argument import Argument
+from ..structures import NonNull
+from ..scalars import String
+
+
+def test_argument():
+    arg = Argument(String, default_value='a', description='desc', name='b')
+    assert arg.type == String
+    assert arg.default_value == 'a'
+    assert arg.description == 'desc'
+    assert arg.name == 'b'
+
+
+def test_argument_comparasion():
+    arg1 = Argument(String, name='Hey', description='Desc', default_value='default')
+    arg2 = Argument(String, name='Hey', description='Desc', default_value='default')
+
+    assert arg1 == arg2
+    assert arg1 != String()
+
+
+def test_argument_required():
+    arg = Argument(String, required=True)
+    assert arg.type == NonNull(String)
diff --git a/graphene/types/tests/test_structures.py b/graphene/types/tests/test_structures.py
new file mode 100644
index 00000000..9027895e
--- /dev/null
+++ b/graphene/types/tests/test_structures.py
@@ -0,0 +1,44 @@
+import pytest
+
+from ..structures import List, NonNull
+from ..scalars import String
+
+
+def test_list():
+    _list = List(String)
+    assert _list.of_type == String
+    assert str(_list) == '[String]'
+
+
+def test_nonnull():
+    nonnull = NonNull(String)
+    assert nonnull.of_type == String
+    assert str(nonnull) == 'String!'
+
+
+def test_list_comparasion():
+    list1 = List(String)
+    list2 = List(String)
+    list3 = List(None)
+
+    list1_argskwargs = List(String, None, b=True)
+    list2_argskwargs = List(String, None, b=True)
+
+    assert list1 == list2
+    assert list1 != list3
+    assert list1_argskwargs == list2_argskwargs
+    assert list1 != list1_argskwargs
+
+
+def test_nonnull_comparasion():
+    nonnull1 = NonNull(String)
+    nonnull2 = NonNull(String)
+    nonnull3 = NonNull(None)
+
+    nonnull1_argskwargs = NonNull(String, None, b=True)
+    nonnull2_argskwargs = NonNull(String, None, b=True)
+
+    assert nonnull1 == nonnull2
+    assert nonnull1 != nonnull3
+    assert nonnull1_argskwargs == nonnull2_argskwargs
+    assert nonnull1 != nonnull1_argskwargs