diff --git a/tests/conftest.py b/tests/conftest.py
index c2bab99..6d924a6 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -5,7 +5,7 @@
 
 import transmogrifier.models as timdex
 from transmogrifier.config import SOURCES, load_external_config
-from transmogrifier.sources.transformer import JsonTransformer, XmlTransformer
+from transmogrifier.sources.transformer import JSONTransformer, XMLTransformer
 from transmogrifier.sources.xml.datacite import Datacite
 
 
@@ -48,21 +48,21 @@ def runner():
 
 @pytest.fixture
 def aardvark_record_all_fields():
-    return JsonTransformer.parse_source_file(
+    return JSONTransformer.parse_source_file(
         "tests/fixtures/aardvark/aardvark_record_all_fields.jsonl"
     )
 
 
 @pytest.fixture()
 def datacite_records():
-    return XmlTransformer.parse_source_file(
+    return XMLTransformer.parse_source_file(
         "tests/fixtures/datacite/datacite_records.xml"
     )
 
 
 @pytest.fixture()
 def datacite_record_all_fields():
-    source_records = XmlTransformer.parse_source_file(
+    source_records = XMLTransformer.parse_source_file(
         "tests/fixtures/datacite/datacite_record_all_fields.xml"
     )
     return Datacite("cool-repo", source_records)
@@ -70,7 +70,7 @@ def datacite_record_all_fields():
 
 @pytest.fixture()
 def aardvark_records():
-    return JsonTransformer.parse_source_file("tests/fixtures/aardvark_records.jsonl")
+    return JSONTransformer.parse_source_file("tests/fixtures/aardvark_records.jsonl")
 
 
 @pytest.fixture()
@@ -85,7 +85,7 @@ def marc_content_type_crosswalk():
 
 @pytest.fixture()
 def oai_pmh_records():
-    return XmlTransformer.parse_source_file("tests/fixtures/oai_pmh_records.xml")
+    return XMLTransformer.parse_source_file("tests/fixtures/oai_pmh_records.xml")
 
 
 @pytest.fixture()
diff --git a/tests/sources/test_transformer.py b/tests/sources/test_transformer.py
index 33ecb84..cda6d22 100644
--- a/tests/sources/test_transformer.py
+++ b/tests/sources/test_transformer.py
@@ -4,7 +4,7 @@
 import pytest
 
 from transmogrifier.models import TimdexRecord
-from transmogrifier.sources.transformer import Transformer, XmlTransformer
+from transmogrifier.sources.transformer import Transformer, XMLTransformer
 from transmogrifier.sources.xml.datacite import Datacite
 
 
@@ -28,7 +28,7 @@ def test_transformer_get_transformer_source_wrong_module_path_raises_error(bad_c
 
 
 def test_xmltransformer_initializes_with_expected_attributes(oai_pmh_records):
-    transformer = XmlTransformer("cool-repo", oai_pmh_records)
+    transformer = XMLTransformer("cool-repo", oai_pmh_records)
     assert transformer.source == "cool-repo"
     assert transformer.source_base_url == "https://example.com/"
     assert transformer.source_name == "A Cool Repository"
@@ -36,7 +36,7 @@ def test_xmltransformer_initializes_with_expected_attributes(oai_pmh_records):
 
 
 def test_xmltransformer_iterates_through_all_records(oai_pmh_records):
-    output_records = XmlTransformer("cool-repo", oai_pmh_records)
+    output_records = XMLTransformer("cool-repo", oai_pmh_records)
     assert len(list(output_records)) == 2
     assert output_records.processed_record_count == 3
     assert output_records.transformed_record_count == 2
@@ -47,10 +47,10 @@ def test_xmltransformer_iterates_successfully_if_get_optional_fields_returns_non
     oai_pmh_records,
 ):
     with patch(
-        "transmogrifier.sources.transformer.XmlTransformer.get_optional_fields"
+        "transmogrifier.sources.transformer.XMLTransformer.get_optional_fields"
     ) as m:
         m.return_value = None
-        output_records = XmlTransformer("cool-repo", oai_pmh_records)
+        output_records = XMLTransformer("cool-repo", oai_pmh_records)
         assert len(list(output_records)) == 0
         assert output_records.processed_record_count == 3
         assert output_records.skipped_record_count == 2
@@ -62,7 +62,7 @@ def test_xmltransformer_transform_and_write_output_files_writes_output_files(
     tmp_path, oai_pmh_records
 ):
     output_file = str(tmp_path / "output_file.json")
-    transformer = XmlTransformer("cool-repo", oai_pmh_records)
+    transformer = XMLTransformer("cool-repo", oai_pmh_records)
     assert not Path(tmp_path / "output_file.json").exists()
     assert not Path(tmp_path / "output_file.txt").exists()
     transformer.transform_and_write_output_files(output_file)
@@ -74,31 +74,31 @@ def test_xmltransformer_transform_and_write_output_files_no_txt_file_if_not_need
     tmp_path,
 ):
     output_file = str(tmp_path / "output_file.json")
-    datacite_records = XmlTransformer.parse_source_file(
+    datacite_records = XMLTransformer.parse_source_file(
         "tests/fixtures/datacite/datacite_records.xml"
     )
-    transformer = XmlTransformer("cool-repo", datacite_records)
+    transformer = XMLTransformer("cool-repo", datacite_records)
     transformer.transform_and_write_output_files(output_file)
     assert len(list(tmp_path.iterdir())) == 1
     assert next(tmp_path.iterdir()).name == "output_file.json"
 
 
 def test_xmltransformer_parse_source_file_returns_record_iterator():
-    records = XmlTransformer.parse_source_file(
+    records = XMLTransformer.parse_source_file(
         "tests/fixtures/datacite/datacite_records.xml"
     )
     assert len(list(records)) == 38
 
 
 def test_xmltransformer_record_is_deleted_returns_true_if_deleted(caplog):
-    source_records = XmlTransformer.parse_source_file(
+    source_records = XMLTransformer.parse_source_file(
         "tests/fixtures/record_deleted.xml"
     )
-    assert XmlTransformer.record_is_deleted(next(source_records)) is True
+    assert XMLTransformer.record_is_deleted(next(source_records)) is True
 
 
 def test_xmltransformer_get_required_fields_returns_expected_values(oai_pmh_records):
-    transformer = XmlTransformer("cool-repo", oai_pmh_records)
+    transformer = XMLTransformer("cool-repo", oai_pmh_records)
     assert transformer.get_required_fields(next(oai_pmh_records)) == {
         "source": "A Cool Repository",
         "source_link": "https://example.com/12345",
@@ -108,7 +108,7 @@ def test_xmltransformer_get_required_fields_returns_expected_values(oai_pmh_reco
 
 
 def test_xmltransformer_transform_returns_timdex_record(oai_pmh_records):
-    transformer = XmlTransformer("cool-repo", oai_pmh_records)
+    transformer = XMLTransformer("cool-repo", oai_pmh_records)
     assert next(transformer) == TimdexRecord(
         source="A Cool Repository",
         source_link="https://example.com/12345",
@@ -120,7 +120,7 @@ def test_xmltransformer_transform_returns_timdex_record(oai_pmh_records):
 
 
 def test_xmltransformer_get_valid_title_with_title_field_blank_logs_warning(caplog):
-    source_records = XmlTransformer.parse_source_file(
+    source_records = XMLTransformer.parse_source_file(
         "tests/fixtures/record_title_field_blank.xml"
     )
     output_records = Datacite("cool-repo", source_records)
@@ -132,7 +132,7 @@ def test_xmltransformer_get_valid_title_with_title_field_blank_logs_warning(capl
 
 
 def test_xmltransformer_get_valid_title_with_title_field_missing_logs_warning(caplog):
-    source_records = XmlTransformer.parse_source_file(
+    source_records = XMLTransformer.parse_source_file(
         "tests/fixtures/record_title_field_missing.xml"
     )
     output_records = Datacite("cool-repo", source_records)
@@ -144,7 +144,7 @@ def test_xmltransformer_get_valid_title_with_title_field_missing_logs_warning(ca
 
 
 def test_xmltransformer_get_valid_title_with_title_field_multiple_logs_warning(caplog):
-    source_records = XmlTransformer.parse_source_file(
+    source_records = XMLTransformer.parse_source_file(
         "tests/fixtures/record_title_field_multiple.xml"
     )
     output_records = Datacite("cool-repo", source_records)
diff --git a/transmogrifier/sources/json/aardvark.py b/transmogrifier/sources/json/aardvark.py
index 32b4859..47324a8 100644
--- a/transmogrifier/sources/json/aardvark.py
+++ b/transmogrifier/sources/json/aardvark.py
@@ -1,12 +1,12 @@
 import logging
 
 import transmogrifier.models as timdex
-from transmogrifier.sources.transformer import JsonTransformer
+from transmogrifier.sources.transformer import JSONTransformer
 
 logger = logging.getLogger(__name__)
 
 
-class MITAardvark(JsonTransformer):
+class MITAardvark(JSONTransformer):
     """MITAardvark transformer.
 
     MIT Aardvark records have more required fields than standard Aardvark records
diff --git a/transmogrifier/sources/transformer.py b/transmogrifier/sources/transformer.py
index d45e8ab..1a0acc8 100644
--- a/transmogrifier/sources/transformer.py
+++ b/transmogrifier/sources/transformer.py
@@ -374,7 +374,7 @@ def get_optional_fields(
         return {}
 
 
-class JsonTransformer(Transformer):
+class JSONTransformer(Transformer):
     """JSON transformer class."""
 
     @final
@@ -525,7 +525,7 @@ def get_optional_fields(self, source_record: dict[str, JSON]) -> Optional[dict]:
         return {}
 
 
-class XmlTransformer(Transformer):
+class XMLTransformer(Transformer):
     """XML transformer class."""
 
     @final
diff --git a/transmogrifier/sources/xml/datacite.py b/transmogrifier/sources/xml/datacite.py
index 7741b04..b46c232 100644
--- a/transmogrifier/sources/xml/datacite.py
+++ b/transmogrifier/sources/xml/datacite.py
@@ -5,12 +5,12 @@
 
 import transmogrifier.models as timdex
 from transmogrifier.helpers import validate_date, validate_date_range
-from transmogrifier.sources.transformer import XmlTransformer
+from transmogrifier.sources.transformer import XMLTransformer
 
 logger = logging.getLogger(__name__)
 
 
-class Datacite(XmlTransformer):
+class Datacite(XMLTransformer):
     """Datacite transformer."""
 
     def get_optional_fields(self, xml: Tag) -> Optional[dict]:
diff --git a/transmogrifier/sources/xml/dspace_dim.py b/transmogrifier/sources/xml/dspace_dim.py
index 433a936..9c3b150 100644
--- a/transmogrifier/sources/xml/dspace_dim.py
+++ b/transmogrifier/sources/xml/dspace_dim.py
@@ -5,12 +5,12 @@
 
 import transmogrifier.models as timdex
 from transmogrifier.helpers import validate_date, validate_date_range
-from transmogrifier.sources.transformer import XmlTransformer
+from transmogrifier.sources.transformer import XMLTransformer
 
 logger = logging.getLogger(__name__)
 
 
-class DspaceDim(XmlTransformer):
+class DspaceDim(XMLTransformer):
     """DSpace DIM transformer."""
 
     def get_optional_fields(self, xml: Tag) -> Optional[dict]:
diff --git a/transmogrifier/sources/xml/dspace_mets.py b/transmogrifier/sources/xml/dspace_mets.py
index 7db882f..6b72868 100644
--- a/transmogrifier/sources/xml/dspace_mets.py
+++ b/transmogrifier/sources/xml/dspace_mets.py
@@ -5,12 +5,12 @@
 
 import transmogrifier.models as timdex
 from transmogrifier.helpers import validate_date
-from transmogrifier.sources.transformer import XmlTransformer
+from transmogrifier.sources.transformer import XMLTransformer
 
 logger = logging.getLogger(__name__)
 
 
-class DspaceMets(XmlTransformer):
+class DspaceMets(XMLTransformer):
     """DSpace METS transformer."""
 
     def get_optional_fields(self, xml: Tag) -> dict:
diff --git a/transmogrifier/sources/xml/ead.py b/transmogrifier/sources/xml/ead.py
index 82cdbad..83e2015 100644
--- a/transmogrifier/sources/xml/ead.py
+++ b/transmogrifier/sources/xml/ead.py
@@ -6,7 +6,7 @@
 import transmogrifier.models as timdex
 from transmogrifier.config import load_external_config
 from transmogrifier.helpers import validate_date, validate_date_range
-from transmogrifier.sources.transformer import XmlTransformer
+from transmogrifier.sources.transformer import XMLTransformer
 
 logger = logging.getLogger(__name__)
 
@@ -16,7 +16,7 @@
 )
 
 
-class Ead(XmlTransformer):
+class Ead(XMLTransformer):
     """EAD transformer."""
 
     def get_optional_fields(self, xml: Tag) -> Optional[dict]:
diff --git a/transmogrifier/sources/xml/marc.py b/transmogrifier/sources/xml/marc.py
index 0077cc4..4ceda70 100644
--- a/transmogrifier/sources/xml/marc.py
+++ b/transmogrifier/sources/xml/marc.py
@@ -6,7 +6,7 @@
 import transmogrifier.models as timdex
 from transmogrifier.config import load_external_config
 from transmogrifier.helpers import validate_date
-from transmogrifier.sources.transformer import XmlTransformer
+from transmogrifier.sources.transformer import XMLTransformer
 
 logger = logging.getLogger(__name__)
 
@@ -30,7 +30,7 @@
 )
 
 
-class Marc(XmlTransformer):
+class Marc(XMLTransformer):
     """Marc transformer."""
 
     def get_optional_fields(self, xml: Tag) -> Optional[dict]:
diff --git a/transmogrifier/sources/xml/oaidc.py b/transmogrifier/sources/xml/oaidc.py
index 7e672c7..2cedbc4 100644
--- a/transmogrifier/sources/xml/oaidc.py
+++ b/transmogrifier/sources/xml/oaidc.py
@@ -5,12 +5,12 @@
 
 import transmogrifier.models as timdex
 from transmogrifier.helpers import validate_date
-from transmogrifier.sources.transformer import XmlTransformer
+from transmogrifier.sources.transformer import XMLTransformer
 
 logger = logging.getLogger(__name__)
 
 
-class OaiDc(XmlTransformer):
+class OaiDc(XMLTransformer):
     """
     Generic OAI DC transformer.