diff --git a/Directory.Packages.props b/Directory.Packages.props
index d4bf259..e3962a6 100644
--- a/Directory.Packages.props
+++ b/Directory.Packages.props
@@ -58,7 +58,7 @@
          the run still passes and still reports a count rather than a proportion. LakeWright.AI
          shipped with only its line transform covered by a test CI ran, and a review caught that
          rather than a number. -->
-    <PackageVersion Include="coverlet.collector" Version="6.0.4" />
+    <PackageVersion Include="coverlet.collector" Version="10.0.1" />
     <!-- Property-based tests over the one value that reaches Databricks unparameterised: a Unity
          Catalog identifier. Example-based tests check the cases someone thought of; this checks
          the ones nobody did, which for an injection guard is the point. -->
diff --git a/tests/LakeWright.TenantIsolation.Tests/packages.lock.json b/tests/LakeWright.TenantIsolation.Tests/packages.lock.json
index ac25db4..5a5279d 100644
--- a/tests/LakeWright.TenantIsolation.Tests/packages.lock.json
+++ b/tests/LakeWright.TenantIsolation.Tests/packages.lock.json
@@ -13,9 +13,9 @@
       },
       "coverlet.collector": {
         "type": "Direct",
-        "requested": "[6.0.4, )",
-        "resolved": "6.0.4",
-        "contentHash": "lkhqpF8Pu2Y7IiN7OntbsTtdbpR1syMsm2F3IgX6ootA4ffRqWL5jF7XipHuZQTdVuWG/gVAAcf8mjk8Tz0xPg=="
+        "requested": "[10.0.1, )",
+        "resolved": "10.0.1",
+        "contentHash": "27jXSV/0DbVqF5jDrAxuQFZ9oaz6gmG03p8ttxAFk+X0M4woFYj7MoWDLCna5EGLb0CE6OE7X6ZH3Wt5smTtaA=="
       },
       "FsCheck": {
         "type": "Direct",