diff --git a/lab/types.py b/lab/types.py
index 65d686d..52bcc01 100644
--- a/lab/types.py
+++ b/lab/types.py
@@ -82,10 +82,10 @@ def _module_attr(module, attr):
 _ag_tensor = ModuleType("autograd.tracer", "Box")
 
 # Define JAX module types.
-if sys.version_info.minor <= 7:
+if sys.version_info.minor <= 7:  # pragma: specific no cover 3.8 3.9 3.10 3.11
     # `jax` 0.4 deprecated Python 3.7 support. Rely on older JAX versions.
     _jax_tensor = ModuleType("jax.interpreters.xla", "DeviceArray")
-else:
+else:  # pragma: specific no cover 3.7
     _jax_tensor = ModuleType("jaxlib.xla_extension", "ArrayImpl")
 _jax_tracer = ModuleType("jax.core", "Tracer")
 _jax_dtype = ModuleType("jax._src.numpy.lax_numpy", "_ScalarMeta")