diff --git a/com.microsoft.copilot.eclipse.ui.test/META-INF/MANIFEST.MF b/com.microsoft.copilot.eclipse.ui.test/META-INF/MANIFEST.MF
index 9d33676c..fa2de66b 100644
--- a/com.microsoft.copilot.eclipse.ui.test/META-INF/MANIFEST.MF
+++ b/com.microsoft.copilot.eclipse.ui.test/META-INF/MANIFEST.MF
@@ -5,28 +5,10 @@ Bundle-SymbolicName: com.microsoft.copilot.eclipse.ui.test;singleton:=true
 Bundle-Version: 0.20.0.qualifier
 Bundle-Vendor: GitHub Copilot
 Bundle-RequiredExecutionEnvironment: JavaSE-17
+Fragment-Host: com.microsoft.copilot.eclipse.ui
 Automatic-Module-Name: com.microsoft.copilot.eclipse.ui.test
-Import-Package: org.objenesis;version="[3.4.0,4.0.0)",
- org.osgi.framework;version="[1.10.0,2.0.0)"
-Require-Bundle: org.mockito.mockito-core;bundle-version="5.14.2",
- org.eclipse.lsp4e;bundle-version="0.18.1",
- org.eclipse.jdt.annotation;resolution:=optional,
- junit-jupiter-api;bundle-version="5.10.1",
+Import-Package: org.objenesis;version="[3.4.0,4.0.0)"
+Require-Bundle: junit-jupiter-api;bundle-version="5.10.1",
  junit-jupiter-params;bundle-version="5.10.1",
- org.mockito.junit-jupiter;bundle-version="5.10.2",
- com.microsoft.copilot.eclipse.core;bundle-version="0.20.0",
- com.microsoft.copilot.eclipse.ui;bundle-version="0.20.0",
- org.eclipse.ui;bundle-version="3.205.0",
- org.eclipse.ui.ide,
- org.eclipse.ui.workbench.texteditor,
- org.eclipse.ui.editors,
- org.eclipse.jface.text;bundle-version="3.24.200",
- org.eclipse.lsp4j;bundle-version="0.21.1",
- org.eclipse.core.resources,
- org.eclipse.core.runtime,
- org.eclipse.core.expressions,
- org.eclipse.core.net;bundle-version="1.5.200",
- org.eclipse.e4.core.services;bundle-version="2.4.200",
- org.osgi.service.event,
- com.google.gson,
- com.microsoft.copilot.eclipse.terminal.api;bundle-version="0.20.0"
+ org.mockito.mockito-core;bundle-version="5.14.2",
+ org.mockito.junit-jupiter;bundle-version="5.10.2"
diff --git a/com.microsoft.copilot.eclipse.ui.test/build.properties b/com.microsoft.copilot.eclipse.ui.test/build.properties
index 4c15b450..07c97efe 100644
--- a/com.microsoft.copilot.eclipse.ui.test/build.properties
+++ b/com.microsoft.copilot.eclipse.ui.test/build.properties
@@ -2,5 +2,5 @@ source.. = src
 output.. = target/classes
 bin.includes = META-INF/,\
                .,\
-               plugin.xml
+               fragment.xml
 
diff --git a/com.microsoft.copilot.eclipse.ui.test/plugin.xml b/com.microsoft.copilot.eclipse.ui.test/fragment.xml
similarity index 100%
rename from com.microsoft.copilot.eclipse.ui.test/plugin.xml
rename to com.microsoft.copilot.eclipse.ui.test/fragment.xml
diff --git a/com.microsoft.copilot.eclipse.ui.test/src/com/microsoft/copilot/eclipse/ui/nes/NesAnnotationTypeMappingTest.java b/com.microsoft.copilot.eclipse.ui.test/src/com/microsoft/copilot/eclipse/ui/nes/NesAnnotationTypeMappingTest.java
index 15aee61e..49ab8d6a 100644
--- a/com.microsoft.copilot.eclipse.ui.test/src/com/microsoft/copilot/eclipse/ui/nes/NesAnnotationTypeMappingTest.java
+++ b/com.microsoft.copilot.eclipse.ui.test/src/com/microsoft/copilot/eclipse/ui/nes/NesAnnotationTypeMappingTest.java
@@ -9,7 +9,9 @@
 import static org.junit.jupiter.api.Assertions.assertTrue;
 
 import org.eclipse.core.resources.IMarker;
+import org.eclipse.core.resources.ResourcesPlugin;
 import org.eclipse.core.runtime.IConfigurationElement;
+import org.eclipse.core.runtime.IExtension;
 import org.eclipse.core.runtime.IExtensionPoint;
 import org.eclipse.core.runtime.Platform;
 import org.eclipse.ui.texteditor.AnnotationTypeLookup;
@@ -19,7 +21,7 @@ class NesAnnotationTypeMappingTest {
 
   private static final String ANNOTATION_TYPES_EXTENSION_POINT = "org.eclipse.ui.editors.annotationTypes";
   private static final String FOREIGN_TEXT_MARKER =
-      "com.microsoft.copilot.eclipse.ui.test.foreignTextMarker";
+      "com.microsoft.copilot.eclipse.ui.foreignTextMarker";
   private static final String NES_ANNOTATION_PREFIX = "com.microsoft.copilot.eclipse.ui.nes.";
   private static final String NES_CHANGE_ANNOTATION = NES_ANNOTATION_PREFIX + "change";
   private static final String NES_DELETE_ANNOTATION = NES_ANNOTATION_PREFIX + "delete";
@@ -31,9 +33,22 @@ void testForeignTextMarkerSubtypeDoesNotResolveToNesAnnotations() {
 
     String annotationType = lookup.getAnnotationType(FOREIGN_TEXT_MARKER, IMarker.SEVERITY_INFO);
 
+    // assert our marker type is properly registered, before checking annotation type mapping
+    assertTrue(isMarkerTypeDeclared(FOREIGN_TEXT_MARKER));
     assertNotEquals(NES_CHANGE_ANNOTATION, annotationType);
     assertNotEquals(NES_DELETE_ANNOTATION, annotationType);
   }
+  
+  private boolean isMarkerTypeDeclared(String markerTypeId) {
+    IExtensionPoint point = Platform.getExtensionRegistry().getExtensionPoint(ResourcesPlugin.PI_RESOURCES,
+        "markers");
+    for (IExtension ext : point.getExtensions()) {
+      if (markerTypeId.equals(ext.getUniqueIdentifier())) {
+        return true;
+      }
+    }
+    return false;
+  }
 
   @Test
   void testNesAnnotationTypesDoNotMapToRootTextMarker() {