diff --git a/src/Testcontainers.FakeGcsServer/FakeGcsServerBuilder.cs b/src/Testcontainers.FakeGcsServer/FakeGcsServerBuilder.cs
index cd1d27258..7e482a141 100644
--- a/src/Testcontainers.FakeGcsServer/FakeGcsServerBuilder.cs
+++ b/src/Testcontainers.FakeGcsServer/FakeGcsServerBuilder.cs
@@ -46,13 +46,13 @@ protected override FakeGcsServerBuilder Init()
             .WithImage(FakeGcsServerImage)
             .WithPortBinding(FakeGcsServerPort, true)
             .WithEntrypoint("/bin/sh", "-c")
-            .WithCommand("while [ ! -f " + StartupScriptFilePath + " ]; do sleep 0.1; done; /bin/sh " + StartupScriptFilePath)
+            .WithCommand("while [ ! -f " + StartupScriptFilePath + " ]; do sleep 0.1; done; " + StartupScriptFilePath)
             .WithWaitStrategy(Wait.ForUnixContainer().UntilMessageIsLogged("server started"))
             .WithStartupCallback((container, ct) =>
             {
                 const char lf = '\n';
                 var startupScript = new StringBuilder();
-                startupScript.Append("#!/bin/bash");
+                startupScript.Append("#!/bin/sh");
                 startupScript.Append(lf);
                 startupScript.Append("fake-gcs-server ");
                 startupScript.Append("-backend memory ");
diff --git a/tests/Testcontainers.FakeGcsServer.Tests/FakeGcsServerContainerTest.cs b/tests/Testcontainers.FakeGcsServer.Tests/FakeGcsServerContainerTest.cs
index 61055283d..56a5ea787 100644
--- a/tests/Testcontainers.FakeGcsServer.Tests/FakeGcsServerContainerTest.cs
+++ b/tests/Testcontainers.FakeGcsServer.Tests/FakeGcsServerContainerTest.cs
@@ -1,6 +1,6 @@
 namespace Testcontainers.FakeGcsServer;
 
-public abstract class FakeGcsServerContainerTest : IAsyncLifetime
+public sealed class FakeGcsServerContainerTest : IAsyncLifetime
 {
     private readonly FakeGcsServerContainer _fakeGcsServerContainer = new FakeGcsServerBuilder().Build();