diff --git a/CHANGELOG.md b/CHANGELOG.md
index 11bd3eaa..34c276c4 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -38,6 +38,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 ### Removed
 
 - [SIL.Chorus] Remove obsolete `ChorusSystem.SetUpLocalization(TranslationMemory, ...)` overload (TranslationMemory type removed in L10NSharp 10)
+- [SIL.Chorus] Remove obsolete `ServerSettingsModel.IsQaServer`
 
 ### Fixed
 
diff --git a/src/LibChorus/Model/ServerSettingsModel.cs b/src/LibChorus/Model/ServerSettingsModel.cs
index fd6bf81f..1d838108 100644
--- a/src/LibChorus/Model/ServerSettingsModel.cs
+++ b/src/LibChorus/Model/ServerSettingsModel.cs
@@ -36,9 +36,6 @@ public static string LanguageForgeServer
 			}
 		}
 
-		[Obsolete("no known clients")]
-		public static bool IsQaServer => !string.IsNullOrEmpty(Environment.GetEnvironmentVariable(ServerEnvVar));
-
 		public static bool IsPrivateServer { get; set; }
 
 		private const string EntropyValue = "LAMED videte si est dolor sicut dolor meus";