diff --git a/README.rst b/README.rst
index 94855fe..c761229 100644
--- a/README.rst
+++ b/README.rst
@@ -299,7 +299,7 @@ automatically generated based on the code of that function:
     ...     return math.sqrt(x)
     >>> square_root(-1)
     Traceback (most recent call last):
-    PreconditionError: @require(lambda args: args.x > 0) failed
+    dpcontracts.PreconditionError: @require(lambda args: args.x > 0) failed
 
 This is true for postconditions as well:
 
@@ -308,7 +308,7 @@ This is true for postconditions as well:
     ...     return x - y
     >>> sub(10, 100)
     Traceback (most recent call last):
-    PostconditionError: @ensure(lambda args, result: result > 0) failed
+    dpcontracts.PostconditionError: @ensure(lambda args, result: result > 0) failed
 
 And of course for invariants:
 
@@ -321,7 +321,7 @@ And of course for invariants:
     >>> counter = Counter(10)
     >>> counter.increment(-100)
     Traceback (most recent call last):
-    PostconditionError: @invariant(lambda self: self.counter >= 0) failed
+    dpcontracts.PostconditionError: @invariant(lambda self: self.counter >= 0) failed
 
 Tests can span more than one line as well:
 
@@ -333,7 +333,7 @@ Tests can span more than one line as well:
     ...     return x - y
     >>> sub2(10, 100)
     Traceback (most recent call last):
-    PostconditionError: @ensure(lambda args, result: all([
+    dpcontracts.PostconditionError: @ensure(lambda args, result: all([
         result > 0])) failed
 
 Preserving Old Values
@@ -342,6 +342,7 @@ Sometimes it's important to be able to compare the results of a function with th
 previous state of the program. Earlier states can be preserved using the
 `preserve` decorator:
 
+    >>> from dpcontracts import preserve
     >>> class Counter:
     ...     def __init__(self, initial_value):
     ...         self.value = initial_value
@@ -359,7 +360,7 @@ previous state of the program. Earlier states can be preserved using the
     >>> counter.increment(10)
     >>> counter.increment(9)
     Traceback (most recent call last):
-    PostconditionError: counter is incremented by value
+    dpcontracts.PostconditionError: counter is incremented by value
 
 Note that Python's pass-by-reference semantics still apply, so if you need to
 preserve an old value, you might have to copy it.
@@ -445,7 +446,7 @@ Contracts can be placed on coroutines (that is, async functions):
     ... async def func(a, b="Foo", *c):
     ...     await asyncio.sleep(1)
 
-    >>> asyncio.get_event_loop().run_until_complete(
+    >>> asyncio.run(
     ...     func( 1, "foo", True, True, False))
 
 Predicates functions themselves cannot be coroutines, as this could