diff --git a/exception_escaping/proxy_module.py b/exception_escaping/proxy_module.py
index aadedb6..0dca7a6 100644
--- a/exception_escaping/proxy_module.py
+++ b/exception_escaping/proxy_module.py
@@ -30,4 +30,4 @@ async def async_wrapper(*args: Any, **kwargs: Any) -> Any:
         elif len(args) == 0:
             return wrapper_of_wrappers
         else:
-            raise ValueError()
+            raise ValueError('You are using the decorator for the wrong purpose.')
diff --git a/tests/test_proxy_module.py b/tests/test_proxy_module.py
index 7cdd736..3b7700d 100644
--- a/tests/test_proxy_module.py
+++ b/tests/test_proxy_module.py
@@ -1,5 +1,7 @@
 import asyncio
 
+import pytest
+
 import exception_escaping
 
 
@@ -59,3 +61,128 @@ async def function(a, b, c=5):
         raise ValueError
 
     asyncio.run(function(1, 2))
+
+
+def test_run_simple_function_with_empty_brackets():
+    some_value = 'kek'
+
+    @exception_escaping()
+    def function():
+        return some_value
+
+    assert function() == some_value
+
+
+def test_run_simple_function_with_some_arguments_with_empty_brackets():
+    @exception_escaping()
+    def function(a, b, c=5):
+        return a + b + c
+
+    assert function(1, 2) == 8
+    assert function(1, 2, 5) == 8
+    assert function(1, 2, c=5) == 8
+    assert function(1, 2, c=8) == 11
+
+
+def test_run_function_with_exception_with_empty_brackets():
+    @exception_escaping()
+    def function(a, b, c=5):
+        raise ValueError
+
+    function(1, 2)
+
+
+def test_run_coroutine_function_with_empty_brackets():
+    some_value = 'kek'
+
+    @exception_escaping()
+    async def function():
+        return some_value
+
+    assert asyncio.run(function()) == some_value
+
+
+def test_run_coroutine_function_with_some_arguments_with_empty_brackets():
+    @exception_escaping()
+    async def function(a, b, c=5):
+        return a + b + c
+
+    assert asyncio.run(function(1, 2)) == 8
+    assert asyncio.run(function(1, 2, 5)) == 8
+    assert asyncio.run(function(1, 2, c=5)) == 8
+    assert asyncio.run(function(1, 2, c=8)) == 11
+
+
+def test_run_coroutine_function_with_exception_with_empty_brackets():
+    @exception_escaping()
+    async def function(a, b, c=5):
+        raise ValueError
+
+    asyncio.run(function(1, 2))
+
+
+def test_run_simple_function_with_default_return():
+    some_value = 'kek'
+
+    @exception_escaping(default_return='lol')
+    def function():
+        return some_value
+
+    assert function() == some_value
+
+
+def test_run_simple_function_with_some_arguments_with_default_return():
+    @exception_escaping(default_return='lol')
+    def function(a, b, c=5):
+        return a + b + c
+
+    assert function(1, 2) == 8
+    assert function(1, 2, 5) == 8
+    assert function(1, 2, c=5) == 8
+    assert function(1, 2, c=8) == 11
+
+
+def test_run_function_with_exception_with_default_return():
+    default_value = 13
+
+    @exception_escaping(default_return=default_value)
+    def function(a, b, c=5):
+        raise ValueError
+
+    assert function(1, 2) == default_value
+
+
+def test_run_coroutine_function_with_default_return():
+    some_value = 'kek'
+
+    @exception_escaping(default_return='lol')
+    async def function():
+        return some_value
+
+    assert asyncio.run(function()) == some_value
+
+
+def test_run_coroutine_function_with_some_arguments_with_default_return():
+    @exception_escaping(default_return='lol')
+    async def function(a, b, c=5):
+        return a + b + c
+
+    assert asyncio.run(function(1, 2)) == 8
+    assert asyncio.run(function(1, 2, 5)) == 8
+    assert asyncio.run(function(1, 2, c=5)) == 8
+    assert asyncio.run(function(1, 2, c=8)) == 11
+
+
+def test_run_coroutine_function_with_exception_with_default_return():
+    default_value = 13
+
+    @exception_escaping(default_return=default_value)
+    async def function(a, b, c=5):
+        raise ValueError
+
+    assert asyncio.run(function(1, 2)) == default_value
+
+
+def test_wrong_argument_to_decorator():
+    with pytest.raises(ValueError, match='You are using the decorator for the wrong purpose.'):
+        exception_escaping('kek')