diff --git a/org.eclipse.xtext.tests/testdata/wizard-expectations/org.xtext.example.eclipsePlugin/org.xtext.example.eclipsePlugin/src/org/xtext/example/mydsl/GenerateMyDsl.mwe2 b/org.eclipse.xtext.tests/testdata/wizard-expectations/org.xtext.example.eclipsePlugin/org.xtext.example.eclipsePlugin/src/org/xtext/example/mydsl/GenerateMyDsl.mwe2
index 14d77a8fa..ceff8a491 100644
--- a/org.eclipse.xtext.tests/testdata/wizard-expectations/org.xtext.example.eclipsePlugin/org.xtext.example.eclipsePlugin/src/org/xtext/example/mydsl/GenerateMyDsl.mwe2
+++ b/org.eclipse.xtext.tests/testdata/wizard-expectations/org.xtext.example.eclipsePlugin/org.xtext.example.eclipsePlugin/src/org/xtext/example/mydsl/GenerateMyDsl.mwe2
@@ -27,6 +27,7 @@ Workflow {
 				encoding = "UTF-8"
 				lineDelimiter = "\n"
 				fileHeader = "/*\n * generated by Xtext \${version}\n */"
+				preferXtendStubs = false
 			}
 		}
 		language = StandardLanguage {
@@ -41,6 +42,9 @@ Workflow {
 				// Generates checks for @Deprecated grammar annotations, an IssueProvider and a corresponding PropertyPage
 				generateDeprecationValidation = true
 			}
+			generator = {
+				generateXtendStub = true
+			}
 		}
 	}
 }
diff --git a/org.eclipse.xtext.tests/testdata/wizard-expectations/org.xtext.example.eclipsePluginP2/org.xtext.example.eclipsePluginP2/src/org/xtext/example/mydsl/GenerateMyDsl.mwe2 b/org.eclipse.xtext.tests/testdata/wizard-expectations/org.xtext.example.eclipsePluginP2/org.xtext.example.eclipsePluginP2/src/org/xtext/example/mydsl/GenerateMyDsl.mwe2
index 04aa8f5df..f5327e56c 100644
--- a/org.eclipse.xtext.tests/testdata/wizard-expectations/org.xtext.example.eclipsePluginP2/org.xtext.example.eclipsePluginP2/src/org/xtext/example/mydsl/GenerateMyDsl.mwe2
+++ b/org.eclipse.xtext.tests/testdata/wizard-expectations/org.xtext.example.eclipsePluginP2/org.xtext.example.eclipsePluginP2/src/org/xtext/example/mydsl/GenerateMyDsl.mwe2
@@ -27,6 +27,7 @@ Workflow {
 				encoding = "UTF-8"
 				lineDelimiter = "\n"
 				fileHeader = "/*\n * generated by Xtext \${version}\n */"
+				preferXtendStubs = false
 			}
 		}
 		language = StandardLanguage {
@@ -41,6 +42,9 @@ Workflow {
 				// Generates checks for @Deprecated grammar annotations, an IssueProvider and a corresponding PropertyPage
 				generateDeprecationValidation = true
 			}
+			generator = {
+				generateXtendStub = true
+			}
 		}
 	}
 }
diff --git a/org.eclipse.xtext.tests/testdata/wizard-expectations/org.xtext.example.full/org.xtext.example.full.parent/org.xtext.example.full/src/org/xtext/example/mydsl/GenerateMyDsl.mwe2 b/org.eclipse.xtext.tests/testdata/wizard-expectations/org.xtext.example.full/org.xtext.example.full.parent/org.xtext.example.full/src/org/xtext/example/mydsl/GenerateMyDsl.mwe2
index 47fd6094b..236aaaa28 100644
--- a/org.eclipse.xtext.tests/testdata/wizard-expectations/org.xtext.example.full/org.xtext.example.full.parent/org.xtext.example.full/src/org/xtext/example/mydsl/GenerateMyDsl.mwe2
+++ b/org.eclipse.xtext.tests/testdata/wizard-expectations/org.xtext.example.full/org.xtext.example.full.parent/org.xtext.example.full/src/org/xtext/example/mydsl/GenerateMyDsl.mwe2
@@ -30,6 +30,7 @@ Workflow {
 				encoding = "UTF-8"
 				lineDelimiter = "\n"
 				fileHeader = "/*\n * generated by Xtext \${version}\n */"
+				preferXtendStubs = false
 			}
 		}
 		language = StandardLanguage {
@@ -44,6 +45,9 @@ Workflow {
 				// Generates checks for @Deprecated grammar annotations, an IssueProvider and a corresponding PropertyPage
 				generateDeprecationValidation = true
 			}
+			generator = {
+				generateXtendStub = true
+			}
 		}
 	}
 }
diff --git a/org.eclipse.xtext.tests/testdata/wizard-expectations/org.xtext.example.gradle/org.xtext.example.gradle.parent/org.xtext.example.gradle/src/main/java/org/xtext/example/mydsl/GenerateMyDsl.mwe2 b/org.eclipse.xtext.tests/testdata/wizard-expectations/org.xtext.example.gradle/org.xtext.example.gradle.parent/org.xtext.example.gradle/src/main/java/org/xtext/example/mydsl/GenerateMyDsl.mwe2
index be9fd9b5b..f49d1a136 100644
--- a/org.eclipse.xtext.tests/testdata/wizard-expectations/org.xtext.example.gradle/org.xtext.example.gradle.parent/org.xtext.example.gradle/src/main/java/org/xtext/example/mydsl/GenerateMyDsl.mwe2
+++ b/org.eclipse.xtext.tests/testdata/wizard-expectations/org.xtext.example.gradle/org.xtext.example.gradle.parent/org.xtext.example.gradle/src/main/java/org/xtext/example/mydsl/GenerateMyDsl.mwe2
@@ -24,6 +24,7 @@ Workflow {
 				encoding = "UTF-8"
 				lineDelimiter = "\n"
 				fileHeader = "/*\n * generated by Xtext \${version}\n */"
+				preferXtendStubs = false
 			}
 		}
 		language = StandardLanguage {
@@ -38,6 +39,9 @@ Workflow {
 				// Generates checks for @Deprecated grammar annotations, an IssueProvider and a corresponding PropertyPage
 				generateDeprecationValidation = true
 			}
+			generator = {
+				generateXtendStub = true
+			}
 		}
 	}
 }
diff --git a/org.eclipse.xtext.tests/testdata/wizard-expectations/org.xtext.example.lsGradleApp/org.xtext.example.lsGradleApp.parent/org.xtext.example.lsGradleApp/src/org/xtext/example/mydsl/GenerateMyDsl.mwe2 b/org.eclipse.xtext.tests/testdata/wizard-expectations/org.xtext.example.lsGradleApp/org.xtext.example.lsGradleApp.parent/org.xtext.example.lsGradleApp/src/org/xtext/example/mydsl/GenerateMyDsl.mwe2
index fe88a528c..281859022 100644
--- a/org.eclipse.xtext.tests/testdata/wizard-expectations/org.xtext.example.lsGradleApp/org.xtext.example.lsGradleApp.parent/org.xtext.example.lsGradleApp/src/org/xtext/example/mydsl/GenerateMyDsl.mwe2
+++ b/org.eclipse.xtext.tests/testdata/wizard-expectations/org.xtext.example.lsGradleApp/org.xtext.example.lsGradleApp.parent/org.xtext.example.lsGradleApp/src/org/xtext/example/mydsl/GenerateMyDsl.mwe2
@@ -20,6 +20,7 @@ Workflow {
 				encoding = "UTF-8"
 				lineDelimiter = "\n"
 				fileHeader = "/*\n * generated by Xtext \${version}\n */"
+				preferXtendStubs = false
 			}
 		}
 		language = StandardLanguage {
@@ -34,6 +35,9 @@ Workflow {
 				// Generates checks for @Deprecated grammar annotations, an IssueProvider and a corresponding PropertyPage
 				generateDeprecationValidation = true
 			}
+			generator = {
+				generateXtendStub = true
+			}
 		}
 	}
 }
diff --git a/org.eclipse.xtext.tests/testdata/wizard-expectations/org.xtext.example.lsGradleFatjar/org.xtext.example.lsGradleFatjar.parent/org.xtext.example.lsGradleFatjar/src/org/xtext/example/mydsl/GenerateMyDsl.mwe2 b/org.eclipse.xtext.tests/testdata/wizard-expectations/org.xtext.example.lsGradleFatjar/org.xtext.example.lsGradleFatjar.parent/org.xtext.example.lsGradleFatjar/src/org/xtext/example/mydsl/GenerateMyDsl.mwe2
index 11b5a9fca..76eab8d44 100644
--- a/org.eclipse.xtext.tests/testdata/wizard-expectations/org.xtext.example.lsGradleFatjar/org.xtext.example.lsGradleFatjar.parent/org.xtext.example.lsGradleFatjar/src/org/xtext/example/mydsl/GenerateMyDsl.mwe2
+++ b/org.eclipse.xtext.tests/testdata/wizard-expectations/org.xtext.example.lsGradleFatjar/org.xtext.example.lsGradleFatjar.parent/org.xtext.example.lsGradleFatjar/src/org/xtext/example/mydsl/GenerateMyDsl.mwe2
@@ -20,6 +20,7 @@ Workflow {
 				encoding = "UTF-8"
 				lineDelimiter = "\n"
 				fileHeader = "/*\n * generated by Xtext \${version}\n */"
+				preferXtendStubs = false
 			}
 		}
 		language = StandardLanguage {
@@ -34,6 +35,9 @@ Workflow {
 				// Generates checks for @Deprecated grammar annotations, an IssueProvider and a corresponding PropertyPage
 				generateDeprecationValidation = true
 			}
+			generator = {
+				generateXtendStub = true
+			}
 		}
 	}
 }
diff --git a/org.eclipse.xtext.tests/testdata/wizard-expectations/org.xtext.example.lsMavenApp/org.xtext.example.lsMavenApp.parent/org.xtext.example.lsMavenApp/src/org/xtext/example/mydsl/GenerateMyDsl.mwe2 b/org.eclipse.xtext.tests/testdata/wizard-expectations/org.xtext.example.lsMavenApp/org.xtext.example.lsMavenApp.parent/org.xtext.example.lsMavenApp/src/org/xtext/example/mydsl/GenerateMyDsl.mwe2
index 3026d63b3..a666678a0 100644
--- a/org.eclipse.xtext.tests/testdata/wizard-expectations/org.xtext.example.lsMavenApp/org.xtext.example.lsMavenApp.parent/org.xtext.example.lsMavenApp/src/org/xtext/example/mydsl/GenerateMyDsl.mwe2
+++ b/org.eclipse.xtext.tests/testdata/wizard-expectations/org.xtext.example.lsMavenApp/org.xtext.example.lsMavenApp.parent/org.xtext.example.lsMavenApp/src/org/xtext/example/mydsl/GenerateMyDsl.mwe2
@@ -20,6 +20,7 @@ Workflow {
 				encoding = "UTF-8"
 				lineDelimiter = "\n"
 				fileHeader = "/*\n * generated by Xtext \${version}\n */"
+				preferXtendStubs = false
 			}
 		}
 		language = StandardLanguage {
@@ -34,6 +35,9 @@ Workflow {
 				// Generates checks for @Deprecated grammar annotations, an IssueProvider and a corresponding PropertyPage
 				generateDeprecationValidation = true
 			}
+			generator = {
+				generateXtendStub = true
+			}
 		}
 	}
 }
diff --git a/org.eclipse.xtext.tests/testdata/wizard-expectations/org.xtext.example.lsMavenFatjar/org.xtext.example.lsMavenFatjar.parent/org.xtext.example.lsMavenFatjar/src/org/xtext/example/mydsl/GenerateMyDsl.mwe2 b/org.eclipse.xtext.tests/testdata/wizard-expectations/org.xtext.example.lsMavenFatjar/org.xtext.example.lsMavenFatjar.parent/org.xtext.example.lsMavenFatjar/src/org/xtext/example/mydsl/GenerateMyDsl.mwe2
index f8e7bc52d..4c0a12d99 100644
--- a/org.eclipse.xtext.tests/testdata/wizard-expectations/org.xtext.example.lsMavenFatjar/org.xtext.example.lsMavenFatjar.parent/org.xtext.example.lsMavenFatjar/src/org/xtext/example/mydsl/GenerateMyDsl.mwe2
+++ b/org.eclipse.xtext.tests/testdata/wizard-expectations/org.xtext.example.lsMavenFatjar/org.xtext.example.lsMavenFatjar.parent/org.xtext.example.lsMavenFatjar/src/org/xtext/example/mydsl/GenerateMyDsl.mwe2
@@ -20,6 +20,7 @@ Workflow {
 				encoding = "UTF-8"
 				lineDelimiter = "\n"
 				fileHeader = "/*\n * generated by Xtext \${version}\n */"
+				preferXtendStubs = false
 			}
 		}
 		language = StandardLanguage {
@@ -34,6 +35,9 @@ Workflow {
 				// Generates checks for @Deprecated grammar annotations, an IssueProvider and a corresponding PropertyPage
 				generateDeprecationValidation = true
 			}
+			generator = {
+				generateXtendStub = true
+			}
 		}
 	}
 }
diff --git a/org.eclipse.xtext.tests/testdata/wizard-expectations/org.xtext.example.lsMavenTychoApp/org.xtext.example.lsMavenTychoApp.parent/org.xtext.example.lsMavenTychoApp/src/org/xtext/example/mydsl/GenerateMyDsl.mwe2 b/org.eclipse.xtext.tests/testdata/wizard-expectations/org.xtext.example.lsMavenTychoApp/org.xtext.example.lsMavenTychoApp.parent/org.xtext.example.lsMavenTychoApp/src/org/xtext/example/mydsl/GenerateMyDsl.mwe2
index 21e8ed470..b935587d6 100644
--- a/org.eclipse.xtext.tests/testdata/wizard-expectations/org.xtext.example.lsMavenTychoApp/org.xtext.example.lsMavenTychoApp.parent/org.xtext.example.lsMavenTychoApp/src/org/xtext/example/mydsl/GenerateMyDsl.mwe2
+++ b/org.eclipse.xtext.tests/testdata/wizard-expectations/org.xtext.example.lsMavenTychoApp/org.xtext.example.lsMavenTychoApp.parent/org.xtext.example.lsMavenTychoApp/src/org/xtext/example/mydsl/GenerateMyDsl.mwe2
@@ -21,6 +21,7 @@ Workflow {
 				encoding = "UTF-8"
 				lineDelimiter = "\n"
 				fileHeader = "/*\n * generated by Xtext \${version}\n */"
+				preferXtendStubs = false
 			}
 		}
 		language = StandardLanguage {
@@ -35,6 +36,9 @@ Workflow {
 				// Generates checks for @Deprecated grammar annotations, an IssueProvider and a corresponding PropertyPage
 				generateDeprecationValidation = true
 			}
+			generator = {
+				generateXtendStub = true
+			}
 		}
 	}
 }
diff --git a/org.eclipse.xtext.tests/testdata/wizard-expectations/org.xtext.example.lsMavenTychoFatjar/org.xtext.example.lsMavenTychoFatjar.parent/org.xtext.example.lsMavenTychoFatjar/src/org/xtext/example/mydsl/GenerateMyDsl.mwe2 b/org.eclipse.xtext.tests/testdata/wizard-expectations/org.xtext.example.lsMavenTychoFatjar/org.xtext.example.lsMavenTychoFatjar.parent/org.xtext.example.lsMavenTychoFatjar/src/org/xtext/example/mydsl/GenerateMyDsl.mwe2
index 4b5e606ba..baee2930d 100644
--- a/org.eclipse.xtext.tests/testdata/wizard-expectations/org.xtext.example.lsMavenTychoFatjar/org.xtext.example.lsMavenTychoFatjar.parent/org.xtext.example.lsMavenTychoFatjar/src/org/xtext/example/mydsl/GenerateMyDsl.mwe2
+++ b/org.eclipse.xtext.tests/testdata/wizard-expectations/org.xtext.example.lsMavenTychoFatjar/org.xtext.example.lsMavenTychoFatjar.parent/org.xtext.example.lsMavenTychoFatjar/src/org/xtext/example/mydsl/GenerateMyDsl.mwe2
@@ -21,6 +21,7 @@ Workflow {
 				encoding = "UTF-8"
 				lineDelimiter = "\n"
 				fileHeader = "/*\n * generated by Xtext \${version}\n */"
+				preferXtendStubs = false
 			}
 		}
 		language = StandardLanguage {
@@ -35,6 +36,9 @@ Workflow {
 				// Generates checks for @Deprecated grammar annotations, an IssueProvider and a corresponding PropertyPage
 				generateDeprecationValidation = true
 			}
+			generator = {
+				generateXtendStub = true
+			}
 		}
 	}
 }
diff --git a/org.eclipse.xtext.tests/testdata/wizard-expectations/org.xtext.example.mavenTycho/org.xtext.example.mavenTycho.parent/org.xtext.example.mavenTycho/src/org/xtext/example/mydsl/GenerateMyDsl.mwe2 b/org.eclipse.xtext.tests/testdata/wizard-expectations/org.xtext.example.mavenTycho/org.xtext.example.mavenTycho.parent/org.xtext.example.mavenTycho/src/org/xtext/example/mydsl/GenerateMyDsl.mwe2
index b705f5629..d51d11817 100644
--- a/org.eclipse.xtext.tests/testdata/wizard-expectations/org.xtext.example.mavenTycho/org.xtext.example.mavenTycho.parent/org.xtext.example.mavenTycho/src/org/xtext/example/mydsl/GenerateMyDsl.mwe2
+++ b/org.eclipse.xtext.tests/testdata/wizard-expectations/org.xtext.example.mavenTycho/org.xtext.example.mavenTycho.parent/org.xtext.example.mavenTycho/src/org/xtext/example/mydsl/GenerateMyDsl.mwe2
@@ -30,6 +30,7 @@ Workflow {
 				encoding = "UTF-8"
 				lineDelimiter = "\n"
 				fileHeader = "/*\n * generated by Xtext \${version}\n */"
+				preferXtendStubs = false
 			}
 		}
 		language = StandardLanguage {
@@ -44,6 +45,9 @@ Workflow {
 				// Generates checks for @Deprecated grammar annotations, an IssueProvider and a corresponding PropertyPage
 				generateDeprecationValidation = true
 			}
+			generator = {
+				generateXtendStub = true
+			}
 		}
 	}
 }
diff --git a/org.eclipse.xtext.tests/testdata/wizard-expectations/org.xtext.example.mavenTychoJ9/org.xtext.example.mavenTychoJ9.parent/org.xtext.example.mavenTychoJ9/src/org/xtext/example/mydsl/GenerateMyDsl.mwe2 b/org.eclipse.xtext.tests/testdata/wizard-expectations/org.xtext.example.mavenTychoJ9/org.xtext.example.mavenTychoJ9.parent/org.xtext.example.mavenTychoJ9/src/org/xtext/example/mydsl/GenerateMyDsl.mwe2
index 19c96474a..b0bca2ffe 100644
--- a/org.eclipse.xtext.tests/testdata/wizard-expectations/org.xtext.example.mavenTychoJ9/org.xtext.example.mavenTychoJ9.parent/org.xtext.example.mavenTychoJ9/src/org/xtext/example/mydsl/GenerateMyDsl.mwe2
+++ b/org.eclipse.xtext.tests/testdata/wizard-expectations/org.xtext.example.mavenTychoJ9/org.xtext.example.mavenTychoJ9.parent/org.xtext.example.mavenTychoJ9/src/org/xtext/example/mydsl/GenerateMyDsl.mwe2
@@ -30,6 +30,7 @@ Workflow {
 				encoding = "UTF-8"
 				lineDelimiter = "\n"
 				fileHeader = "/*\n * generated by Xtext \${version}\n */"
+				preferXtendStubs = false
 			}
 		}
 		language = StandardLanguage {
@@ -44,6 +45,9 @@ Workflow {
 				// Generates checks for @Deprecated grammar annotations, an IssueProvider and a corresponding PropertyPage
 				generateDeprecationValidation = true
 			}
+			generator = {
+				generateXtendStub = true
+			}
 		}
 	}
 }
diff --git a/org.eclipse.xtext.tests/testdata/wizard-expectations/org.xtext.example.mavenTychoP2/org.xtext.example.mavenTychoP2.parent/org.xtext.example.mavenTychoP2/src/org/xtext/example/mydsl/GenerateMyDsl.mwe2 b/org.eclipse.xtext.tests/testdata/wizard-expectations/org.xtext.example.mavenTychoP2/org.xtext.example.mavenTychoP2.parent/org.xtext.example.mavenTychoP2/src/org/xtext/example/mydsl/GenerateMyDsl.mwe2
index 551f6e839..82b11ec4f 100644
--- a/org.eclipse.xtext.tests/testdata/wizard-expectations/org.xtext.example.mavenTychoP2/org.xtext.example.mavenTychoP2.parent/org.xtext.example.mavenTychoP2/src/org/xtext/example/mydsl/GenerateMyDsl.mwe2
+++ b/org.eclipse.xtext.tests/testdata/wizard-expectations/org.xtext.example.mavenTychoP2/org.xtext.example.mavenTychoP2.parent/org.xtext.example.mavenTychoP2/src/org/xtext/example/mydsl/GenerateMyDsl.mwe2
@@ -30,6 +30,7 @@ Workflow {
 				encoding = "UTF-8"
 				lineDelimiter = "\n"
 				fileHeader = "/*\n * generated by Xtext \${version}\n */"
+				preferXtendStubs = false
 			}
 		}
 		language = StandardLanguage {
@@ -44,6 +45,9 @@ Workflow {
 				// Generates checks for @Deprecated grammar annotations, an IssueProvider and a corresponding PropertyPage
 				generateDeprecationValidation = true
 			}
+			generator = {
+				generateXtendStub = true
+			}
 		}
 	}
 }
diff --git a/org.eclipse.xtext.tests/testdata/wizard-expectations/org.xtext.example.plainMaven/org.xtext.example.plainMaven.parent/org.xtext.example.plainMaven/src/main/java/org/xtext/example/mydsl/GenerateMyDsl.mwe2 b/org.eclipse.xtext.tests/testdata/wizard-expectations/org.xtext.example.plainMaven/org.xtext.example.plainMaven.parent/org.xtext.example.plainMaven/src/main/java/org/xtext/example/mydsl/GenerateMyDsl.mwe2
index 0123262d4..d7baef9e0 100644
--- a/org.eclipse.xtext.tests/testdata/wizard-expectations/org.xtext.example.plainMaven/org.xtext.example.plainMaven.parent/org.xtext.example.plainMaven/src/main/java/org/xtext/example/mydsl/GenerateMyDsl.mwe2
+++ b/org.eclipse.xtext.tests/testdata/wizard-expectations/org.xtext.example.plainMaven/org.xtext.example.plainMaven.parent/org.xtext.example.plainMaven/src/main/java/org/xtext/example/mydsl/GenerateMyDsl.mwe2
@@ -24,6 +24,7 @@ Workflow {
 				encoding = "UTF-8"
 				lineDelimiter = "\n"
 				fileHeader = "/*\n * generated by Xtext \${version}\n */"
+				preferXtendStubs = false
 			}
 		}
 		language = StandardLanguage {
@@ -38,6 +39,9 @@ Workflow {
 				// Generates checks for @Deprecated grammar annotations, an IssueProvider and a corresponding PropertyPage
 				generateDeprecationValidation = true
 			}
+			generator = {
+				generateXtendStub = true
+			}
 		}
 	}
 }
diff --git a/org.eclipse.xtext.xtext.wizard/src/org/eclipse/xtext/xtext/wizard/RuntimeProjectDescriptor.xtend b/org.eclipse.xtext.xtext.wizard/src/org/eclipse/xtext/xtext/wizard/RuntimeProjectDescriptor.xtend
index 1764d1f1a..888edbd56 100644
--- a/org.eclipse.xtext.xtext.wizard/src/org/eclipse/xtext/xtext/wizard/RuntimeProjectDescriptor.xtend
+++ b/org.eclipse.xtext.xtext.wizard/src/org/eclipse/xtext/xtext/wizard/RuntimeProjectDescriptor.xtend
@@ -238,6 +238,7 @@ class RuntimeProjectDescriptor extends TestedProjectDescriptor {
 							encoding = "«config.encoding»"
 							lineDelimiter = "«Strings.convertToJavaString(config.lineDelimiter)»"
 							fileHeader = "/*\n * generated by Xtext \${version}\n */"
+							preferXtendStubs = false
 						}
 					}
 					language = StandardLanguage {
@@ -265,6 +266,9 @@ class RuntimeProjectDescriptor extends TestedProjectDescriptor {
 							// Generates checks for @Deprecated grammar annotations, an IssueProvider and a corresponding PropertyPage
 							generateDeprecationValidation = true
 						}
+						generator = {
+							generateXtendStub = true
+						}
 						«IF config.junitVersion == JUnitVersion.JUNIT_5»
 							junitSupport = {
 								junitVersion = "5"
diff --git a/org.eclipse.xtext.xtext.wizard/xtend-gen/org/eclipse/xtext/xtext/wizard/RuntimeProjectDescriptor.java b/org.eclipse.xtext.xtext.wizard/xtend-gen/org/eclipse/xtext/xtext/wizard/RuntimeProjectDescriptor.java
index c7fa672df..e58217488 100644
--- a/org.eclipse.xtext.xtext.wizard/xtend-gen/org/eclipse/xtext/xtext/wizard/RuntimeProjectDescriptor.java
+++ b/org.eclipse.xtext.xtext.wizard/xtend-gen/org/eclipse/xtext/xtext/wizard/RuntimeProjectDescriptor.java
@@ -463,6 +463,9 @@ public class RuntimeProjectDescriptor extends TestedProjectDescriptor {
     _builder.append("\t\t\t\t");
     _builder.append("fileHeader = \"/*\\n * generated by Xtext \\${version}\\n */\"");
     _builder.newLine();
+    _builder.append("\t\t\t\t");
+    _builder.append("preferXtendStubs = false");
+    _builder.newLine();
     _builder.append("\t\t\t");
     _builder.append("}");
     _builder.newLine();
@@ -549,6 +552,15 @@ public class RuntimeProjectDescriptor extends TestedProjectDescriptor {
     _builder.append("\t\t\t");
     _builder.append("}");
     _builder.newLine();
+    _builder.append("\t\t\t");
+    _builder.append("generator = {");
+    _builder.newLine();
+    _builder.append("\t\t\t\t");
+    _builder.append("generateXtendStub = true");
+    _builder.newLine();
+    _builder.append("\t\t\t");
+    _builder.append("}");
+    _builder.newLine();
     {
       JUnitVersion _junitVersion = this.getConfig().getJunitVersion();
       boolean _equals_1 = Objects.equal(_junitVersion, JUnitVersion.JUNIT_5);