diff --git a/cryptography/hazmat/primitives/kdf/hkdf.py b/cryptography/hazmat/primitives/kdf/hkdf.py
index 6d34a0f..44e1481 100644
--- a/cryptography/hazmat/primitives/kdf/hkdf.py
+++ b/cryptography/hazmat/primitives/kdf/hkdf.py
@@ -103,7 +103,7 @@
 
 
 @utils.register_interface(interfaces.KeyDerivationFunction)
-class HKDFExpandOnly(HKDF):
+class HKDFExpand(HKDF):
     def __init__(self, algorithm, length, info, backend):
         HKDF.__init__(self, algorithm, length, None, info, backend)
 
diff --git a/docs/hazmat/primitives/key-derivation-functions.rst b/docs/hazmat/primitives/key-derivation-functions.rst
index 9b76bf6..11fbd4e 100644
--- a/docs/hazmat/primitives/key-derivation-functions.rst
+++ b/docs/hazmat/primitives/key-derivation-functions.rst
@@ -220,7 +220,7 @@
         raises an exception if they do not match.
 
 
-.. class:: HKDFExpandOnly(algorithm, length, info, backend)
+.. class:: HKDFExpand(algorithm, length, info, backend)
 
     .. versionadded:: 0.5
 
@@ -230,7 +230,7 @@
 
     .. warning::
 
-        HKDFExpandOnly should only be used if the key material is
+        HKDFExpand should only be used if the key material is
         cryptographically strong. You should use
         :class:`~cryptography.hazmat.primitives.kdf.hkdf.HKDF` if
         you are unsure.
@@ -239,19 +239,19 @@
 
         >>> import os
         >>> from cryptography.hazmat.primitives import hashes
-        >>> from cryptography.hazmat.primitives.kdf.hkdf import HKDFExpandOnly
+        >>> from cryptography.hazmat.primitives.kdf.hkdf import HKDFExpand
         >>> from cryptography.hazmat.backends import default_backend
         >>> backend = default_backend()
         >>> info = b"hkdf-example"
         >>> key_material = os.urandom(16)
-        >>> hkdf = HKDFExpandOnly(
+        >>> hkdf = HKDFExpand(
         ...     algorithm=hashes.SHA256(),
         ...     length=32,
         ...     info=info,
         ...     backend=backend
         ... )
         >>> key = hkdf.derive(key_material)
-        >>> hkdf = HKDFExpandOnly(
+        >>> hkdf = HKDFExpand(
         ...     algorithm=hashes.SHA256(),
         ...     length=32,
         ...     info=info,
diff --git a/tests/hazmat/primitives/test_hkdf.py b/tests/hazmat/primitives/test_hkdf.py
index 904ed69..bee4217 100644
--- a/tests/hazmat/primitives/test_hkdf.py
+++ b/tests/hazmat/primitives/test_hkdf.py
@@ -23,7 +23,7 @@
     AlreadyFinalized, InvalidKey, _Reasons
 )
 from cryptography.hazmat.primitives import hashes
-from cryptography.hazmat.primitives.kdf.hkdf import HKDF, HKDFExpandOnly
+from cryptography.hazmat.primitives.kdf.hkdf import HKDF, HKDFExpand
 
 from ...utils import raises_unsupported_algorithm
 
@@ -154,7 +154,7 @@
 
 
 @pytest.mark.hmac
-class TestHKDFExpandOnly(object):
+class TestHKDFExpand(object):
     def test_derive(self, backend):
         prk = binascii.unhexlify(
             b"077709362c2e32df0ddc3f0dc47bba6390b6c73bb50f9c3122ec844ad7c2b3e5"
@@ -164,7 +164,7 @@
                b"5bf34007208d5b887185865")
 
         info = binascii.unhexlify(b"f0f1f2f3f4f5f6f7f8f9")
-        hkdf = HKDFExpandOnly(hashes.SHA256(), 42, info, backend)
+        hkdf = HKDFExpand(hashes.SHA256(), 42, info, backend)
 
         assert binascii.hexlify(hkdf.derive(prk)) == okm
 
@@ -177,7 +177,7 @@
                b"5bf34007208d5b887185865")
 
         info = binascii.unhexlify(b"f0f1f2f3f4f5f6f7f8f9")
-        hkdf = HKDFExpandOnly(hashes.SHA256(), 42, info, backend)
+        hkdf = HKDFExpand(hashes.SHA256(), 42, info, backend)
 
         assert hkdf.verify(prk, binascii.unhexlify(okm)) is None
 
@@ -187,14 +187,14 @@
         )
 
         info = binascii.unhexlify(b"f0f1f2f3f4f5f6f7f8f9")
-        hkdf = HKDFExpandOnly(hashes.SHA256(), 42, info, backend)
+        hkdf = HKDFExpand(hashes.SHA256(), 42, info, backend)
 
         with pytest.raises(InvalidKey):
             hkdf.verify(prk, b"wrong key")
 
     def test_already_finalized(self, backend):
         info = binascii.unhexlify(b"f0f1f2f3f4f5f6f7f8f9")
-        hkdf = HKDFExpandOnly(hashes.SHA256(), 42, info, backend)
+        hkdf = HKDFExpand(hashes.SHA256(), 42, info, backend)
 
         hkdf.derive(b"first")
 
@@ -203,7 +203,7 @@
 
     def test_unicode_error(self, backend):
         info = binascii.unhexlify(b"f0f1f2f3f4f5f6f7f8f9")
-        hkdf = HKDFExpandOnly(hashes.SHA256(), 42, info, backend)
+        hkdf = HKDFExpand(hashes.SHA256(), 42, info, backend)
 
         with pytest.raises(TypeError):
             hkdf.derive(six.u("first"))