diff --git a/pyproject.toml b/pyproject.toml
index 1929ca83b0..35f568b477 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -151,6 +151,7 @@ addopts = "-ra -s"
 testpaths = [
     "tests/test_classes",
     "tests/test_application/test_cli/test_csv_utils.py",
+    "tests/test_tasks/test_task_utilities/test_util/test_augur_uuid.py",
     # "tests/test_routes", # runs, but needs a fixture for connecting to the web interface of Augur
     # "tests/test_metrics",
     # "tests/test_tasks",
diff --git a/tests/test_tasks/test_task_utilities/test_util/test_augur_uuid.py b/tests/test_tasks/test_task_utilities/test_util/test_augur_uuid.py
new file mode 100644
index 0000000000..a377468e40
--- /dev/null
+++ b/tests/test_tasks/test_task_utilities/test_util/test_augur_uuid.py
@@ -0,0 +1,160 @@
+import pytest
+import uuid
+from augur.tasks.util.AugurUUID import AugurUUID, GithubUUID, GitlabUUID, UnresolvableUUID
+
+# AugurUUID tests
+
+# this checks whether a brand new AugurUUID object starts as 16 zero bytes
+def test_augur_uuid_initializes_with_16_zero_bytes():
+    uid = AugurUUID()
+    assert len(uid.bytes) == 16
+    assert all(b == 0 for b in uid.bytes)
+
+# checks that githubUUID sets its platform number to 1
+def test_github_uuid_platform_is_1():
+    uid = GithubUUID()
+    assert uid["platform"] == 1
+
+# checks that gitlabUUID sets its platform number to 2
+def test_gitlab_uuid_platform_is_2():
+    uid = GitlabUUID()
+    assert uid["platform"] == 2
+
+# checks the that you can store a value in the user field
+def test_github_uuid_set_user():
+    uid = GithubUUID()
+    uid["user"] = 12345
+    assert uid["user"] == 12345
+
+# tests platform_id edge cases
+def test_set_platform_id_raises_on_non_integer():
+    uid = AugurUUID()
+    with pytest.raises(ValueError):
+        uid.set_platform_id("github")
+
+def test_set_platform_id_raises_on_overflow():
+    uid = AugurUUID()
+    with pytest.raises(ValueError):
+        uid.set_platform_id(256)  # too big for 1 byte
+
+# checks that writing to one field doesnt accidentally overwrite bytes belonging to another field
+def test_fields_dont_overlap():
+    uid = GithubUUID()
+
+    uid["user"] = 12345
+    uid["repo"] = 99999
+
+    assert uid["user"] == 12345
+    assert uid["repo"] == 99999
+
+# checks that to_UUID returs the uuid.UUID object
+def test_to_uuid_returns_valid_uuid():
+    uid = GithubUUID()
+    uid["user"] = 15
+    result = uid.to_UUID()
+    assert isinstance(result, uuid.UUID)
+
+# checks the start_byte is within range(0, 16) for set_bytes
+def test_set_bytes_raises_on_invalid_start_byte():
+    uid = AugurUUID()
+    with pytest.raises(ValueError):
+        uid.set_bytes([1, 2, 3], 16)
+
+# checks that set_bytes correctly raises an error when you write more bytes that will fit in the UUID starting at a given position
+def test_set_bytes_raises_on_too_many_bytes():
+    uid = AugurUUID()
+    with pytest.raises(ValueError):
+        uid.set_bytes([1] * 10, 10)
+
+# checks that writeint correctly rejects a number
+def test_write_int_raises_on_overflow():
+    uid = GithubUUID()
+    with pytest.raises(ValueError):
+        uid["user"] = 99999999999  # too big for 4 bytes
+
+def test_write_int_with_non_integer():
+    uid = GithubUUID()
+
+    with pytest.raises(ValueError):
+        uid.write_int("abc", 1, 4)
+
+def test_write_int_and_get_int_roundtrip():
+    uid = AugurUUID()
+    uid.write_int(65535, 1, 2)
+    assert uid.get_int(1, 2) == 65535
+
+# checks __int__ method
+def test_int_conversion():
+    uid = AugurUUID()
+    uid.set_byte(15, 1)
+    assert int(uid) == 1
+
+def test_get_byte_invalid_index():
+    uid = AugurUUID()
+    with pytest.raises(IndexError):
+        uid.get_byte(20)
+
+# checks that set_byte correctly rejects a value that is too large
+def test_set_byte_raises_on_invalid_value():
+    uid = AugurUUID()
+    with pytest.raises(ValueError):
+        uid.set_byte(0, 256)  # too big for one byte
+
+# checks that set_byte rejects an index that doesnt exist
+def test_set_byte_raises_on_out_of_range_index():
+    uid = AugurUUID()
+    with pytest.raises(IndexError):
+        uid.set_byte(16, 1)  # index 16 is out of bounds
+
+def test_set_byte_raises_on_non_integer():
+    uid = AugurUUID()
+    with pytest.raises(ValueError):
+        uid.set_byte(0, "hello")
+
+# checks that 2 UUIDs with the same values are considered equal.
+def test_equality():
+    uid1 = GithubUUID()
+    uid2 = GithubUUID()
+    uid1["user"] = 100
+    uid2["user"] = 100
+    assert uid1 == uid2
+
+# checks that 2 UUIDs with different values are not equal
+def test_inequality():
+    uid1 = GithubUUID()
+    uid2 = GithubUUID()
+    uid1["user"] = 100
+    uid2["user"] = 200
+    assert uid1 != uid2
+
+# checks that the same user produces different user IDs across platforms
+def test_github_and_gitlab_different_for_same_user():
+    github_uid = GithubUUID()
+    gitlab_uid = GitlabUUID()
+    github_uid["user"] = 100
+    gitlab_uid["user"] = 100
+    assert github_uid != gitlab_uid
+
+def test_dict_representation():
+    uid = GithubUUID()
+    uid["user"] = 10
+
+    result = uid.__dict__()
+
+    assert result["platform"] == 1
+    assert result["user"] == 10
+
+def test_string_representation():
+    uid = GithubUUID()
+    uid["user"] = 10
+
+    result = str(uid)
+
+    assert "user" in result
+    assert "platform" in result
+
+def test_setting_same_field_twice():
+    uid = GithubUUID()
+    uid["user"] = 42
+    uid["user"] = 100  # overwrite with different value
+    assert uid["user"] == 100
\ No newline at end of file