diff --git a/tests/forms_tests/field_tests/test_emailfield.py b/tests/forms_tests/field_tests/test_emailfield.py
index 601318bae3..9261b020b8 100644
--- a/tests/forms_tests/field_tests/test_emailfield.py
+++ b/tests/forms_tests/field_tests/test_emailfield.py
@@ -8,9 +8,9 @@ from . import FormFieldAssertionsMixin
 class EmailFieldTest(FormFieldAssertionsMixin, SimpleTestCase):
     def test_emailfield_1(self):
         f = EmailField()
-        self.assertEqual(f.max_length, 320)
+        self.assertEqual(f.max_length, 254)
         self.assertWidgetRendersTo(
-            f, '<input type="email" name="f" id="id_f" maxlength="320" required>'
+            f, '<input type="email" name="f" id="id_f" maxlength="254" required>'
         )
         with self.assertRaisesMessage(ValidationError, "'This field is required.'"):
             f.clean("")
@@ -64,7 +64,9 @@ class EmailFieldTest(FormFieldAssertionsMixin, SimpleTestCase):
             "'Ensure this value has at most 15 characters (it has 20).'",
         ):
             f.clean("alf123456788@foo.com")
-
+        email = 'a' * 245 + '@example.com'  # This email has 255 characters
+        with self.assertRaisesMessage(ValidationError, "'Ensure this value has at most 254 characters (it has 255).'"):
+            f.clean(email)
     def test_emailfield_strip_on_none_value(self):
         f = EmailField(required=False, empty_value=None)
         self.assertIsNone(f.clean(""))
diff --git a/tests/forms_tests/tests/test_forms.py b/tests/forms_tests/tests/test_forms.py
index a86d443e33..a33f20f6ed 100644
--- a/tests/forms_tests/tests/test_forms.py
+++ b/tests/forms_tests/tests/test_forms.py
@@ -556,7 +556,7 @@ class FormsTestCase(SimpleTestCase):
         f = SignupForm(auto_id=False)
         self.assertHTMLEqual(
             str(f["email"]),
-            '<input type="email" name="email" maxlength="320" required>',
+            '<input type="email" name="email" maxlength="254" required>',
         )
         self.assertHTMLEqual(
             str(f["get_spam"]), '<input type="checkbox" name="get_spam" required>'
@@ -565,7 +565,7 @@ class FormsTestCase(SimpleTestCase):
         f = SignupForm({"email": "test@example.com", "get_spam": True}, auto_id=False)
         self.assertHTMLEqual(
             str(f["email"]),
-            '<input type="email" name="email" maxlength="320" value="test@example.com" '
+            '<input type="email" name="email" maxlength="254" value="test@example.com" '
             "required>",
         )
         self.assertHTMLEqual(
@@ -3709,7 +3709,7 @@ Options: <select multiple name="options" aria-invalid="true" required>
             <option value="false">No</option>
             </select></li>
             <li><label for="id_email">Email:</label>
-            <input type="email" name="email" id="id_email" maxlength="320"></li>
+            <input type="email" name="email" id="id_email" maxlength="254"></li>
             <li class="required error"><ul class="errorlist">
             <li>This field is required.</li></ul>
             <label class="required" for="id_age">Age:</label>
@@ -3732,7 +3732,7 @@ Options: <select multiple name="options" aria-invalid="true" required>
             <option value="false">No</option>
             </select></p>
             <p><label for="id_email">Email:</label>
-            <input type="email" name="email" id="id_email" maxlength="320"></p>
+            <input type="email" name="email" id="id_email" maxlength="254"></p>
             <ul class="errorlist"><li>This field is required.</li></ul>
             <p class="required error"><label class="required" for="id_age">Age:</label>
             <input type="number" name="age" id="id_age" aria-invalid="true" required>
@@ -3752,7 +3752,7 @@ Options: <select multiple name="options" aria-invalid="true" required>
 <option value="false">No</option>
 </select></td></tr>
 <tr><th><label for="id_email">Email:</label></th><td>
-<input type="email" name="email" id="id_email" maxlength="320"></td></tr>
+<input type="email" name="email" id="id_email" maxlength="254"></td></tr>
 <tr class="required error"><th><label class="required" for="id_age">Age:</label></th>
 <td><ul class="errorlist"><li>This field is required.</li></ul>
 <input type="number" name="age" id="id_age" aria-invalid="true" required></td></tr>""",
@@ -3768,7 +3768,7 @@ Options: <select multiple name="options" aria-invalid="true" required>
             '<option value="unknown" selected>Unknown</option>'
             '<option value="true">Yes</option><option value="false">No</option>'
             '</select></div><div><label for="id_email">Email:</label>'
-            '<input type="email" name="email" id="id_email" maxlength="320"/></div>'
+            '<input type="email" name="email" id="id_email" maxlength="254"/></div>'
             '<div class="required error"><label for="id_age" class="required">Age:'
             '</label><ul class="errorlist"><li>This field is required.</li></ul>'
             '<input type="number" name="age" required id="id_age" '
@@ -5291,7 +5291,7 @@ class OverrideTests(SimpleTestCase):
             '<div class="errorlist">'
             '<div class="error">Enter a valid email address.</div></div>'
             "<p>Email: "
-            '<input type="email" name="email" value="invalid" maxlength="320" '
+            '<input type="email" name="email" value="invalid" maxlength="254" '
             'aria-invalid="true" required></p><div class="errorlist">'
             '<div class="error">This field is required.</div></div>'
             '<p>Comment: <input type="text" name="comment" aria-invalid="true" '