diff --git a/src/poetry/inspection/info.py b/src/poetry/inspection/info.py
index 3fae1739c9b..02cf66a2b35 100644
--- a/src/poetry/inspection/info.py
+++ b/src/poetry/inspection/info.py
@@ -248,7 +248,7 @@ def _from_distribution(
         if dist.metadata_version not in pkginfo.distribution.HEADER_ATTRS:
             # This check can be replaced once upstream implements strict parsing
             # https://bugs.launchpad.net/pkginfo/+bug/2058697
-            raise ValueError("Unknown metadata version")
+            raise ValueError(f"Unknown metadata version: {dist.metadata_version}")
 
         requirements = None
 
diff --git a/tests/inspection/test_info.py b/tests/inspection/test_info.py
index e88792c4d1d..f62d1908e0f 100644
--- a/tests/inspection/test_info.py
+++ b/tests/inspection/test_info.py
@@ -190,7 +190,7 @@ def test_info_from_wheel_metadata_version_unknown(
     with pytest.raises(PackageInfoError) as e:
         PackageInfo.from_wheel(path)
 
-    assert "Unknown metadata version" in str(e.value)
+    assert "Unknown metadata version: 999.3" in str(e.value)
 
 
 def test_info_from_wheel_metadata(demo_wheel_metadata: RawMetadata) -> None: