1 files changed, 21 insertions, 4 deletions
diff --git a/tests/hazmat/primitives/test_cast5.py b/tests/hazmat/primitives/test_cast5.py
index 682b4496..60228299 100644
--- a/tests/hazmat/primitives/test_cast5.py
+++ b/tests/hazmat/primitives/test_cast5.py
@@ -31,7 +31,7 @@ from ...utils import load_nist_vectors
     skip_message="Does not support CAST5 ECB",
 )
 @pytest.mark.cipher
-class TestCAST5_ECB(object):
+class TestCAST5ModeECB(object):
     test_ECB = generate_encrypt_test(
         load_nist_vectors,
         os.path.join("ciphers", "CAST5"),
@@ -48,7 +48,7 @@ class TestCAST5_ECB(object):
     skip_message="Does not support CAST5 CBC",
 )
 @pytest.mark.cipher
-class TestCAST5_CBC(object):
+class TestCAST5ModeCBC(object):
     test_CBC = generate_encrypt_test(
         load_nist_vectors,
         os.path.join("ciphers", "CAST5"),
@@ -65,7 +65,7 @@ class TestCAST5_CBC(object):
     skip_message="Does not support CAST5 OFB",
 )
 @pytest.mark.cipher
-class TestCAST5_OFB(object):
+class TestCAST5ModeOFB(object):
     test_OFB = generate_encrypt_test(
         load_nist_vectors,
         os.path.join("ciphers", "CAST5"),
@@ -82,7 +82,7 @@ class TestCAST5_OFB(object):
     skip_message="Does not support CAST5 CFB",
 )
 @pytest.mark.cipher
-class TestCAST5_CFB(object):
+class TestCAST5ModeCFB(object):
     test_CFB = generate_encrypt_test(
         load_nist_vectors,
         os.path.join("ciphers", "CAST5"),
@@ -90,3 +90,20 @@ class TestCAST5_CFB(object):
         lambda key, **kwargs: algorithms.CAST5(binascii.unhexlify((key))),
         lambda iv, **kwargs: modes.CFB(binascii.unhexlify(iv))
     )
+
+
+@pytest.mark.supported(
+    only_if=lambda backend: backend.cipher_supported(
+        algorithms.CAST5("\x00" * 16), modes.CTR("\x00" * 8)
+    ),
+    skip_message="Does not support CAST5 CTR",
+)
+@pytest.mark.cipher
+class TestCAST5ModeCTR(object):
+    test_CTR = generate_encrypt_test(
+        load_nist_vectors,
+        os.path.join("ciphers", "CAST5"),
+        ["cast5-ctr.txt"],
+        lambda key, **kwargs: algorithms.CAST5(binascii.unhexlify((key))),
+        lambda iv, **kwargs: modes.CTR(binascii.unhexlify(iv))
+    )