diff --git a/package/docs/images/readme-banner-dark.png b/package/docs/images/readme-banner-dark.png
index 2366dc9..6ec4db3 100644
Binary files a/package/docs/images/readme-banner-dark.png and b/package/docs/images/readme-banner-dark.png differ
diff --git a/package/docs/images/readme-banner-light.png b/package/docs/images/readme-banner-light.png
index 55f50fe..7ce08c5 100644
Binary files a/package/docs/images/readme-banner-light.png and b/package/docs/images/readme-banner-light.png differ
diff --git a/tests/PackageIntegrity.Tests.ps1 b/tests/PackageIntegrity.Tests.ps1
index e6cdbcf..4bb0308 100644
--- a/tests/PackageIntegrity.Tests.ps1
+++ b/tests/PackageIntegrity.Tests.ps1
@@ -2,10 +2,14 @@
 # Real signature, timestamp, hashing and filesystem checks; no trust mocks.
 BeforeAll {
     $script:Source = Join-Path (Split-Path $PSScriptRoot -Parent) 'package'
-    $script:Fixture = Join-Path $TestDrive 'signed-runtime'
+    $script:FixtureNumber = 0
+    $script:Fixture = $null
     function Reset-SignedFixture {
         Remove-Module PurviewDlpReport -Force -ErrorAction SilentlyContinue
-        if (Test-Path -LiteralPath $script:Fixture) { Remove-Item -LiteralPath $script:Fixture -Recurse -Force }
+        # Loaded SQLite assemblies stay locked on Windows until the test process exits.
+        $script:FixtureNumber++
+        $script:Fixture = Join-Path $TestDrive ('signed-runtime-{0:D4}' -f $script:FixtureNumber)
+        if (Test-Path -LiteralPath $script:Fixture) { throw "Unexpected existing test fixture: $script:Fixture" }
         Copy-Item -LiteralPath $script:Source -Destination $script:Fixture -Recurse
     }
     function Invoke-RealGuard {