diff --git a/Lombiq.Tests.UI/SecurityScanning/ZapManager.cs b/Lombiq.Tests.UI/SecurityScanning/ZapManager.cs
index addea5713..8a1150a14 100644
--- a/Lombiq.Tests.UI/SecurityScanning/ZapManager.cs
+++ b/Lombiq.Tests.UI/SecurityScanning/ZapManager.cs
@@ -183,7 +183,7 @@ public async Task<SecurityScanResult> RunSecurityScanAsync(
         return new SecurityScanResult(reportsDirectoryPath, SarifLog.Load(jsonReports[0]));
     }
 
-    public ValueTask DisposeAsync()
+    public async ValueTask DisposeAsync()
     {
         if (_cancellationTokenSource != null && !_cancellationTokenSource.IsCancellationRequested)
         {
@@ -191,7 +191,23 @@ public ValueTask DisposeAsync()
             _cancellationTokenSource.Dispose();
         }
 
-        return ValueTask.CompletedTask;
+        try
+        {
+            using var cleanupCancellationTokenSource = new CancellationTokenSource(TimeSpan.FromSeconds(30));
+            var cleanupCancellationToken = cleanupCancellationTokenSource.Token;
+            var imagesOutput = await _docker.ExecuteAndGetOutputAsync(
+                cleanupCancellationToken, "images", _zapImage, "--format", "{{.ID}}");
+
+            if (!string.IsNullOrEmpty(imagesOutput))
+            {
+                await _docker.ExecuteAsync(cleanupCancellationToken, "image", "rm", _zapImage);
+            }
+        }
+        catch (Exception ex)
+        {
+            _testOutputHelper.WriteLineTimestampedAndDebug(
+                "Removing the Docker image {0} for ZAP failed with the following exception: {1}", _zapImage, ex);
+        }
     }
 
     private async Task EnsureInitializedAsync()