diff --git a/DistTestCore/Codex/CodexContainerRecipe.cs b/DistTestCore/Codex/CodexContainerRecipe.cs
index 0bbfc87..67e59ef 100644
--- a/DistTestCore/Codex/CodexContainerRecipe.cs
+++ b/DistTestCore/Codex/CodexContainerRecipe.cs
@@ -56,7 +56,7 @@ namespace DistTestCore.Codex
             }
             if (config.BlockTTL != null)
             {
-                AddEnvVar("BLOCK_TTL", config.BlockTTL.ToString()!);
+                AddEnvVar("CODEX_BLOCK_TTL", config.BlockTTL.ToString()!);
             }
             if (config.MetricsEnabled)
             {
diff --git a/Tests/PeerDiscoveryTests/VariableImageTests.cs b/Tests/PeerDiscoveryTests/VariableImageTests.cs
index 54af262..95a8dee 100644
--- a/Tests/PeerDiscoveryTests/VariableImageTests.cs
+++ b/Tests/PeerDiscoveryTests/VariableImageTests.cs
@@ -13,6 +13,7 @@ namespace Tests.PeerDiscoveryTests
         [TestCase("nim-codex:sha-3f2b417")]
         [TestCase("nim-codex:sha-00f6554")]
         [TestCase("nim-codex:sha-f053135")]
+        [TestCase("nim-codex:sha-711e5e0")]
         public void ThreeNodes(string dockerImage)
         {
             var img = "codexstorage/" + dockerImage;