diff --git a/docs/development/test-vectors.rst b/docs/development/test-vectors.rst
index a02fb24005b2..6c5a7e738853 100644
--- a/docs/development/test-vectors.rst
+++ b/docs/development/test-vectors.rst
@@ -288,6 +288,8 @@ Custom asymmetric vectors
 * ``asymmetric/PKCS8/rsa-pbewithmd5anddescbc.pem`` - A PKCS8 encoded RSA key
   encrypted using the ``pbeWithMD5AndDES-CBC`` algorithm with the password
   ``hunter2``.
+* ``asymmetric/PKCS8/rsa-pbe-3des-long-salt.pem`` - A PKCS8 encoded RSA key
+  encrypted with a 20 byte salt with the password ``password``.
 
 Key exchange
 ~~~~~~~~~~~~
diff --git a/tests/hazmat/primitives/test_serialization.py b/tests/hazmat/primitives/test_serialization.py
index 70062f156f17..79122fc133f0 100644
--- a/tests/hazmat/primitives/test_serialization.py
+++ b/tests/hazmat/primitives/test_serialization.py
@@ -463,6 +463,20 @@ def test_load_pkcs8_private_key_unknown_kdf(self):
         with pytest.raises(ValueError):
             load_pem_private_key(data, password=b"password")
 
+    @pytest.mark.skip_fips(reason="3DES unsupported in FIPS")
+    def test_load_pkcs8_pbes_long_salt(self):
+        data = load_vectors_from_file(
+            os.path.join("asymmetric", "PKCS8", "rsa-pbe-3des-long-salt.pem"),
+            lambda f: f.read(),
+            mode="rb",
+        )
+        key = load_pem_private_key(
+            data, password=b"password", unsafe_skip_rsa_key_validation=True
+        )
+        assert isinstance(key, rsa.RSAPrivateKey)
+        assert key.key_size == 4096
+        assert key.private_numbers().public_numbers.e == 65537
+
     @pytest.mark.parametrize(
         "filename",
         [
diff --git a/vectors/cryptography_vectors/asymmetric/PKCS8/rsa-pbe-3des-long-salt.pem b/vectors/cryptography_vectors/asymmetric/PKCS8/rsa-pbe-3des-long-salt.pem
new file mode 100644
index 000000000000..0ea24f106673
--- /dev/null
+++ b/vectors/cryptography_vectors/asymmetric/PKCS8/rsa-pbe-3des-long-salt.pem
@@ -0,0 +1,53 @@
+-----BEGIN ENCRYPTED PRIVATE KEY-----
+MIIJdjAoBgoqhkiG9w0BDAEDMBoEFGDV4FIOX7x+wuD8+HxUyvCh7beeAgIIAASC
+CUilyA7jms8ptwpQ8qkRgFZUC6nM3wHnMNgTiSCPUCPJBVVQH93tKwskpjVopy/z
+moLY7YAkCaOoK0hBuq7RPG7Q5Fu/c3cJygEETf5CGBBddEyu79KKBngg/RzQRBYM
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+2oCgLQpMQl9P+qBepCyRjb3ZiUS7KgVukhI=
+-----END ENCRYPTED PRIVATE KEY-----