diff --git a/tests/test_apicep.py b/tests/test_apicep.py
index bf999bb..74bd3ea 100644
--- a/tests/test_apicep.py
+++ b/tests/test_apicep.py
@@ -5,11 +5,13 @@
 from brazilcep import WebService, exceptions, get_address_from_cep
 
 IN_GITHUB_ACTIONS = os.getenv("GITHUB_ACTIONS") == "true"
+SKIP_REAL_TEST = os.getenv("SKIP_REAL_TEST", False)
 
 
+@pytest.mark.skipif(SKIP_REAL_TEST, reason="Skip real teste API.")
 @pytest.mark.skipif(IN_GITHUB_ACTIONS, reason="Test doesn't work in Github Actions.")
 def test_fetch_address_success_real():
-    # Realizamos a consulta de CEP
+
     address = get_address_from_cep("37.503-130", webservice=WebService.APICEP)
 
     assert address["district"] == "Santo Antônio"
@@ -21,6 +23,7 @@ def test_fetch_address_success_real():
 
 
 def test_fetch_address_success(requests_mock):
+
     req_mock_text = """{
         "status":200,
         "ok":true,
@@ -34,7 +37,6 @@ def test_fetch_address_success(requests_mock):
 
     requests_mock.get("https://ws.apicep.com/cep/37503130.json", text=req_mock_text)
 
-    # Realizamos a consulta de CEP
     address = get_address_from_cep("37.503-130", webservice=WebService.APICEP, timeout=5)
 
     assert address["district"] == "Santo Antônio"
@@ -59,10 +61,7 @@ def test_fetch_address_success(requests_mock):
 
     proxies = {"https": "00.00.000.000", "http": "00.00.000.000"}
 
-    # Realizamos a consulta de CEP
-    address = get_address_from_cep(
-        "99999-999", webservice=WebService.APICEP, timeout=5, proxies=proxies
-    )
+    address = get_address_from_cep("99999-999", webservice=WebService.APICEP, timeout=5, proxies=proxies)
 
     assert address["district"] == ""
     assert address["cep"] == "99999-999"
@@ -79,7 +78,6 @@ def test_fetch_address_cep_not_found(requests_mock):
 
     requests_mock.get("https://ws.apicep.com/cep/00000000.json", text=req_mock_text)
 
-    # Realizamos a consulta de CEP
     with pytest.raises(exceptions.CEPNotFound):
         get_address_from_cep("00000-000", webservice=WebService.APICEP)
 
@@ -109,7 +107,7 @@ def test_fetch_address_blocked_by_flood(requests_mock):
 
 
 def test_fetch_address_404(requests_mock):
-    requests_mock.get("https://ws.apicep.com/cep/37503130.json", status_code=404)  # noqa
+    requests_mock.get("https://ws.apicep.com/cep/37503130.json", status_code=404)
 
     with pytest.raises(exceptions.BrazilCEPException):
         get_address_from_cep("37503-130", webservice=WebService.APICEP)
diff --git a/tests/test_client.py b/tests/test_client.py
index 0f013b5..a5f0104 100644
--- a/tests/test_client.py
+++ b/tests/test_client.py
@@ -5,6 +5,7 @@
 from brazilcep import WebService, get_address_from_cep
 from brazilcep.client import _format_cep
 
+
 def test_search_error():
     with pytest.raises(KeyError):
         get_address_from_cep("37.503-130", webservice=5)
@@ -44,6 +45,7 @@ def test_format_cep_fail():
     with pytest.raises(ValueError):
         _format_cep(True)
 
+
 def test_a_deprecated_enum_value():
 
     with catch_warnings(record=True) as w:
@@ -55,4 +57,4 @@ def test_a_deprecated_enum_value():
         get_address_from_cep("37.503-130", webservice=WebService.CORREIOS)
         assert len(w) == 1
         assert issubclass(w[0].category, DeprecationWarning)
-        assert str(w[0].message) == 'CORREIOS is going to be deprecated. Please, use other webservice.'
+        assert str(w[0].message) == "CORREIOS is going to be deprecated. Please, use other webservice."
diff --git a/tests/test_opencep.py b/tests/test_opencep.py
index 5d751f2..cb25778 100644
--- a/tests/test_opencep.py
+++ b/tests/test_opencep.py
@@ -5,11 +5,13 @@
 from brazilcep import WebService, exceptions, get_address_from_cep
 
 IN_GITHUB_ACTIONS = os.getenv("GITHUB_ACTIONS") == "true"
+SKIP_REAL_TEST = os.getenv("SKIP_REAL_TEST", False)
 
 
+@pytest.mark.skipif(SKIP_REAL_TEST, reason="Skip real teste API.")
 @pytest.mark.skipif(IN_GITHUB_ACTIONS, reason="Test doesn't work in Github Actions.")
 def test_fetch_address_success_real():
-    # Realizamos a consulta de CEP
+
     address = get_address_from_cep("37.503-130", webservice=WebService.OPENCEP)
 
     assert address["district"] == "Santo Antônio"
@@ -33,7 +35,6 @@ def test_fetch_address_success(requests_mock):
 
     requests_mock.get("https://opencep.com/v1/37503130", text=req_mock_text, status_code=200)
 
-    # Realizamos a consulta de CEP
     address = get_address_from_cep("37.503-130", webservice=WebService.OPENCEP, timeout=5)
 
     assert address["district"] == "Santo Antônio"
@@ -58,10 +59,7 @@ def test_fetch_address_success(requests_mock):
 
     proxies = {"https": "00.00.000.000", "http": "00.00.000.000"}
 
-    # Realizamos a consulta de CEP
-    address = get_address_from_cep(
-        "99999-999", webservice=WebService.OPENCEP, timeout=6, proxies=proxies
-    )
+    address = get_address_from_cep("99999-999", webservice=WebService.OPENCEP, timeout=6, proxies=proxies)
 
     assert address["district"] == "Jardim Centro Cívico"
     assert address["cep"] == "99999-999"
@@ -75,7 +73,6 @@ def test_fetch_address_cep_not_found(requests_mock):
 
     requests_mock.get("https://opencep.com/v1/00000000", status_code=404)
 
-    # Realizamos a consulta de CEP
     with pytest.raises(exceptions.CEPNotFound):
         get_address_from_cep("00000-000", webservice=WebService.OPENCEP)
 
diff --git a/tests/test_viacep.py b/tests/test_viacep.py
index fafd7f9..13515a1 100644
--- a/tests/test_viacep.py
+++ b/tests/test_viacep.py
@@ -9,11 +9,13 @@
 logger = logging.getLogger(__name__)
 
 IN_GITHUB_ACTIONS = os.getenv("GITHUB_ACTIONS") == "true"
+SKIP_REAL_TEST = os.getenv("SKIP_REAL_TEST", False)
 
 
+@pytest.mark.skipif(SKIP_REAL_TEST, reason="Skip real teste API.")
 @pytest.mark.skipif(IN_GITHUB_ACTIONS, reason="Test doesn't work in Github Actions.")
 def test_get_address_from_cep_success_real():
-    # Realizamos a consulta de CEP
+
     try:
         address = get_address_from_cep("37.503-130", webservice=WebService.VIACEP)
 
@@ -47,7 +49,6 @@ def test_get_address_from_cep_success(requests_mock):
 
     proxies = {"https": "00.00.000.000", "http": "00.00.000.000"}
 
-    # Realizamos a consulta de CEP
     address = get_address_from_cep("37.503-130", webservice=WebService.VIACEP, timeout=10, proxies=proxies)
 
     assert address["district"] == "Santo Antônio"
@@ -78,7 +79,6 @@ def test_get_address_from_cep_not_found(requests_mock):
 def test_get_address_invalid_cep(requests_mock):
     requests_mock.get("http://www.viacep.com.br/ws/3750313/json", status_code=400)
 
-    # Realizamos a consulta de CEP
     with pytest.raises(exceptions.InvalidCEP):
         get_address_from_cep("37503-13", webservice=WebService.VIACEP)