diff --git a/tests/xharness/Jenkins.cs b/tests/xharness/Jenkins.cs
index 8281e0860b..4d6102d9f2 100644
--- a/tests/xharness/Jenkins.cs
+++ b/tests/xharness/Jenkins.cs
@@ -175,6 +175,7 @@ namespace xharness
 			public string Defines;
 			public string Undefines;
 			public bool Ignored;
+			public bool EnableSGenConc;
 			public bool UseThumb;
 			public MonoNativeFlavor MonoNativeFlavor;
 			public MonoNativeLinkMode MonoNativeLinkMode;
@@ -218,6 +219,7 @@ namespace xharness
 				case "monotouch-test":
 					yield return new TestData { Variation = "Release (all optimizations)", MTouchExtraArgs = "--registrar:static --optimize:all", Debug = false, Profiling = false, Defines = "OPTIMIZEALL" };
 					yield return new TestData { Variation = "Debug (all optimizations)", MTouchExtraArgs = "--registrar:static --optimize:all", Debug = true, Profiling = false, Defines = "OPTIMIZEALL" };
+					yield return new TestData { Variation = "Debug: SGenConc", MTouchExtraArgs = "", Debug = true, Profiling = false, MonoNativeLinkMode = MonoNativeLinkMode.Static, EnableSGenConc = true};
 					if (supports_interpreter) {
 						yield return new TestData { Variation = "Debug (interpreter)", MTouchExtraArgs = "--interpreter", Debug = true, Profiling = false, };
 						yield return new TestData { Variation = "Debug (interpreter -mscorlib)", MTouchExtraArgs = "--interpreter=-mscorlib", Debug = true, Profiling = false, };
@@ -225,6 +227,7 @@ namespace xharness
 					}
 					break;
 				case "mscorlib":
+					yield return new TestData { Variation = "Debug: SGenConc", MTouchExtraArgs = "", Debug = true, Profiling = false, MonoNativeLinkMode = MonoNativeLinkMode.Static, EnableSGenConc = true};
 					if (supports_interpreter) {
 						yield return new TestData { Variation = "Debug (interpreter)", MTouchExtraArgs = "--interpreter", Debug = true, Profiling = false, Undefines = "FULL_AOT_RUNTIME" };
 						yield return new TestData { Variation = "Debug (interpreter -mscorlib)", MTouchExtraArgs = "--interpreter=-mscorlib", Debug = true, Profiling = false, Undefines = "FULL_AOT_RUNTIME" };
@@ -232,6 +235,7 @@ namespace xharness
 					}
 					break;
 				case "mini":
+					yield return new TestData { Variation = "Debug: SGenConc", MTouchExtraArgs = "", Debug = true, Profiling = false, MonoNativeLinkMode = MonoNativeLinkMode.Static, EnableSGenConc = true};
 					if (supports_interpreter) {
 						yield return new TestData { Variation = "Debug (interpreter)", MTouchExtraArgs = "--interpreter", Debug = true, Profiling = false, Undefines = "FULL_AOT_RUNTIME" };
 						yield return new TestData { Variation = "Debug (interpreter -mscorlib)", MTouchExtraArgs = "--interpreter=-mscorlib", Debug = true, Profiling = false, Undefines = "FULL_AOT_RUNTIME" };
@@ -348,6 +352,8 @@ namespace xharness
 								mono_native_link = MonoNativeLinkMode.Static;
 							MonoNativeHelper.AddProjectDefines (clone.Xml, test_data.MonoNativeFlavor, mono_native_link, task.ProjectPlatform, configuration);
 						}
+						if (test_data.EnableSGenConc)
+							clone.Xml.SetNode ("MtouchEnableSGenConc", "true", task.ProjectPlatform, configuration);
 						if (test_data.UseThumb) // no need to check the platform, already done at the data iterator
 							clone.Xml.SetNode ("MtouchUseThumb", "true", task.ProjectPlatform, configuration);