diff --git a/tests/data_files/lms_lmshss_sha256_m32_h5_lmots_sha256_n32_w8.prv b/tests/data_files/lms_lmshss_sha256_m32_h5_lmots_sha256_n32_w8.prv
new file mode 100644
index 0000000..db85e01
--- /dev/null
+++ b/tests/data_files/lms_lmshss_sha256_m32_h5_lmots_sha256_n32_w8.prv
Binary files differ
diff --git a/tests/suites/test_suite_lms.data b/tests/suites/test_suite_lms.data
index 5acf69c..1201156 100644
--- a/tests/suites/test_suite_lms.data
+++ b/tests/suites/test_suite_lms.data
@@ -146,6 +146,53 @@
 # * <hash-sigs/demo> verify tmp/lms message.bin
 lms_verify_test:"0705ba8297c7b9fa5f08e37825ad24a0":"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":"0000000600000004e18760ef2c86192aee88579e376f35cd153419d622803a483e79f6d368629308a8ab6ff663c4f108b2033af290dcedfa":0
 
+LMS hsslms interop test #1
+# This test uses data from https://github.com/pmvr/python-hsslms due to the
+# limited amount of available test vectors for LMS. The private key is stored in
+# data_files/lms_hsslms_sha256_m32_h5_lmots_sha256_n32_w8.prv
+#
+# To reproduce the signature:
+# sudo pip3 install hsslms==0.1.2
+#
+# from hsslms import LMS_Priv, LMS_ALGORITHM_TYPE, LMOTS_ALGORITHM_TYPE
+# import pickle
+#
+# with open('tests/data_files/lms_lmshss_sha256_m32_h5_lmots_sha256_n32_w8.prv', 'rb') as private_key_file:
+#     private_key = pickle.load(private_key_file)
+#
+# public_key = private_key.gen_pub()
+#
+# message = bytes.fromhex('60da1a17c88c59da8a730e6ca8effd37')
+# sig = private_key.sign(message)
+#
+# print('lms_verify_test:"{}":"{}":"{}":0'.format(message.hex(), sig.hex(), public_key.get_pubkey().hex()))
+lms_verify_test:"60da1a17c88c59da8a730e6ca8effd37":"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":"000000060000000447cc5b29dd0cecd01c382434a6d16864d51b60cdb2a9eed2419015d8524c717ce38a865d7a37da6c84f94621ad595f5d":0
+
+LMS hsslms interop test #2
+# This test uses data from https://github.com/pmvr/python-hsslms due to the
+# limited amount of available test vectors for LMS. The private key is stored in
+# data_files/lms_hsslms_sha256_m32_h5_lmots_sha256_n32_w8.prv
+#
+# To reproduce the signature:
+# sudo pip3 install hsslms==0.1.2
+#
+# from hsslms import LMS_Priv, LMS_ALGORITHM_TYPE, LMOTS_ALGORITHM_TYPE
+# import pickle
+#
+# with open('tests/data_files/lms_lmshss_sha256_m32_h5_lmots_sha256_n32_w8.prv', 'rb') as private_key_file:
+#     private_key = pickle.load(private_key_file)
+#
+# public_key = private_key.gen_pub()
+#
+# message = bytes.fromhex('60da1a17c88c59da8a730e6ca8effd37')
+# sig = private_key.sign(message)
+#
+# message = bytes.fromhex('92d036bde8c45b8bb5dea2a072560b1e29fc4bb7dc4549ce90bccee8a6e962a1')
+# sig = private_key.sign(message)
+#
+# print('lms_verify_test:"{}":"{}":"{}":0'.format(message.hex(), sig.hex(), public_key.get_pubkey().hex()))
+lms_verify_test:"92d036bde8c45b8bb5dea2a072560b1e29fc4bb7dc4549ce90bccee8a6e962a1":"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":"000000060000000447cc5b29dd0cecd01c382434a6d16864d51b60cdb2a9eed2419015d8524c717ce38a865d7a37da6c84f94621ad595f5d":0
+
 LMS negative test (invalid lms type) #1
 # This test uses the data from hash-sigs interop test #1. This test has a valid
 # LMOTS type (0x4) but an invalid LMS type (0x7), and should fail with a bad