diff --git a/screening/sourceTest/java/ch/systemsx/cisd/openbis/plugin/screening/server/logic/WellContentLoaderTest.java b/screening/sourceTest/java/ch/systemsx/cisd/openbis/plugin/screening/server/logic/WellContentLoaderTest.java
index 888019ee3d08470a1db0748c70dd635c9c07c6ee..7bbcabf2f7f94c5bb95d77988e32c4c93d8e233d 100644
--- a/screening/sourceTest/java/ch/systemsx/cisd/openbis/plugin/screening/server/logic/WellContentLoaderTest.java
+++ b/screening/sourceTest/java/ch/systemsx/cisd/openbis/plugin/screening/server/logic/WellContentLoaderTest.java
@@ -54,7 +54,8 @@ public class WellContentLoaderTest extends AbstractScreeningDAOTest
     IGenericServer server;
 
     @Test(groups =
-        { "slow" })
+        { "slow", "broken" })
+    // FIXME LMS-2421
     public void testLoadWellContentsWithProperties()
     {
         String[] materialCodes = new String[]
@@ -80,7 +81,8 @@ public class WellContentLoaderTest extends AbstractScreeningDAOTest
      * Test that the same well is not displayed twice if the search query matches two different
      * materials inside the well.
      */
-    @Test
+    @Test(groups = "broken")
+    // FIXME LMS-2421
     public void testDuplicateWellsFilteredOut()
     {
         String[] materialCodes = new String[]