diff --git a/okonomiyaki/runtimes/runtime_metadata.py b/okonomiyaki/runtimes/runtime_metadata.py
index ed9d415..d103630 100644
--- a/okonomiyaki/runtimes/runtime_metadata.py
+++ b/okonomiyaki/runtimes/runtime_metadata.py
@@ -209,7 +209,7 @@ def runtime_metadata_factory(path_or_file):
     key = _factory_key_from_metadata(json_dict)
     klass = _METADATA_KLASS_FACTORY.get(key)
     if klass is None:
-        msg = "No support for language '{1}' ('{0!r}')".format(*key)
+        msg = "No support for language '{1}' (metadata version '{0}')".format(*key)
         raise UnsupportedMetadata(key[0], msg)
     else:
         return klass._from_path(path_or_file)

MetadataVersion object should not be repr()'d in exception message
```python
'cpython-2.7.9+1-rh5_x86_64-gnu.runtime': No support for language 'whitespace' ('MetadataVersion(1, 0)')
```

https://github.com/enthought/okonomiyaki/blob/master/okonomiyaki/runtimes/runtime_metadata.py#L212
diff --git a/okonomiyaki/runtimes/tests/test_runtime_metadata.py b/okonomiyaki/runtimes/tests/test_runtime_metadata.py
index 1fc8f65..1a3c660 100644
--- a/okonomiyaki/runtimes/tests/test_runtime_metadata.py
+++ b/okonomiyaki/runtimes/tests/test_runtime_metadata.py
@@ -203,7 +203,7 @@ class TestRuntimeMetadataFactory(unittest.TestCase):
         # When/Then
         with self.assertRaisesRegexp(
                 UnsupportedMetadata,
-                r"^No support for language 'r' \('MetadataVersion\(1, 0\)'\)"):
+                r"^No support for language 'r' \(metadata version '1.0'\)"):
             runtime_metadata_factory(path)
 
         # Given

pip install -e .[dev]
parse_log_pytest
requirements.txt
pytest
apt-get update apt-get install -y gcc
3.9
dev_requirements.txt
pytest --no-header -rA --tb=line --color=no -p no:cacheprovider -W ignore::DeprecationWarning
attrs==25.3.0
coverage==7.8.0
docutils==0.21.2
enum34==1.1.10
exceptiongroup==1.2.2
flake8==7.2.0
haas==0.9.0
iniconfig==2.1.0
jsonschema==4.23.0
jsonschema-specifications==2024.10.1
mccabe==0.7.0
mock==1.0.1
-e git+https://github.com/enthought/okonomiyaki.git@38b9e3ecc18d2041f43a7681d05ed860b76b8d01#egg=okonomiyaki
packaging==24.2
pbr==6.1.1
pluggy==1.5.0
pycodestyle==2.13.0
pyflakes==3.3.2
pytest==8.3.5
referencing==0.36.2
rpds-py==0.24.0
six==1.17.0
statistics==1.0.3.5
stevedore==1.9.0
testfixtures==8.3.0
tomli==2.2.1
typing_extensions==4.13.0
zipfile2==0.0.12

name: okonomiyaki
channels:
  - defaults
  - https://repo.anaconda.com/pkgs/main
  - https://repo.anaconda.com/pkgs/r
  - conda-forge
dependencies:
  - _libgcc_mutex=0.1=main
  - _openmp_mutex=5.1=1_gnu
  - ca-certificates=2025.2.25=h06a4308_0
  - ld_impl_linux-64=2.40=h12ee557_0
  - libffi=3.4.4=h6a678d5_1
  - libgcc-ng=11.2.0=h1234567_1
  - libgomp=11.2.0=h1234567_1
  - libstdcxx-ng=11.2.0=h1234567_1
  - ncurses=6.4=h6a678d5_0
  - openssl=3.0.16=h5eee18b_0
  - pip=25.0=py39h06a4308_0
  - python=3.9.21=he870216_1
  - readline=8.2=h5eee18b_0
  - setuptools=75.8.0=py39h06a4308_0
  - sqlite=3.45.3=h5eee18b_0
  - tk=8.6.14=h39e8969_0
  - tzdata=2025a=h04d1e81_0
  - wheel=0.45.1=py39h06a4308_0
  - xz=5.6.4=h5eee18b_1
  - zlib=1.2.13=h5eee18b_1
  - pip:
      - argparse==1.4.0
      - attrs==25.3.0
      - coverage==7.8.0
      - docutils==0.21.2
      - enum34==1.1.10
      - exceptiongroup==1.2.2
      - flake8==7.2.0
      - haas==0.9.0
      - iniconfig==2.1.0
      - jsonschema==4.23.0
      - jsonschema-specifications==2024.10.1
      - mccabe==0.7.0
      - mock==1.0.1
      - packaging==24.2
      - pbr==6.1.1
      - pluggy==1.5.0
      - pycodestyle==2.13.0
      - pyflakes==3.3.2
      - pytest==8.3.5
      - referencing==0.36.2
      - rpds-py==0.24.0
      - six==1.17.0
      - statistics==1.0.3.5
      - stevedore==1.9.0
      - testfixtures==8.3.0
      - tomli==2.2.1
      - typing-extensions==4.13.0
      - zipfile2==0.0.12
prefix: /opt/conda/envs/okonomiyaki

okonomiyaki/runtimes/tests/test_runtime_metadata.py::TestRuntimeMetadataFactory::test_invalid
okonomiyaki/runtimes/tests/test_runtime_metadata.py::TestPythonMetadataV1::test_invalid okonomiyaki/runtimes/tests/test_runtime_metadata.py::TestPythonMetadataV1::test_simple okonomiyaki/runtimes/tests/test_runtime_metadata.py::TestPythonMetadataV1::test_simple_pypy okonomiyaki/runtimes/tests/test_runtime_metadata.py::TestJuliaRuntimeMetadataV1::test_simple okonomiyaki/runtimes/tests/test_runtime_metadata.py::TestRuntimeMetadataFactory::test_simple
okonomiyaki/runtimes/runtime_metadata.py
okonomiyaki/runtimes/runtime_metadata.py