diff --git a/common/source/java/ch/systemsx/cisd/common/collections/TableMap.java b/common/source/java/ch/systemsx/cisd/common/collections/TableMap.java
index 256ff8bea2d772a67034d211c3a440ac3044af7e..d4a4d25ff1a1319770a83df86fe5535aa6be7dfe 100644
--- a/common/source/java/ch/systemsx/cisd/common/collections/TableMap.java
+++ b/common/source/java/ch/systemsx/cisd/common/collections/TableMap.java
@@ -170,7 +170,7 @@ public class TableMap<K, E> implements Iterable<E>
         E elem = tryGet(key);
         if (elem == null)
         {
-            throw new IllegalStateException("No value for teh specified key found: " + key);
+            throw new IllegalStateException("No value for the specified key found: " + key);
         }
         return elem;
     }
diff --git a/datastore_server/sourceTest/java/ch/systemsx/cisd/openbis/dss/generic/server/DatasetDownloadServletTest.java b/datastore_server/sourceTest/java/ch/systemsx/cisd/openbis/dss/generic/server/DatasetDownloadServletTest.java
index 2cf99fdbf416e1be460847389c785cd26569b337..b12013bb6e7c35d834998426c4acdc0b09c51350 100644
--- a/datastore_server/sourceTest/java/ch/systemsx/cisd/openbis/dss/generic/server/DatasetDownloadServletTest.java
+++ b/datastore_server/sourceTest/java/ch/systemsx/cisd/openbis/dss/generic/server/DatasetDownloadServletTest.java
@@ -422,7 +422,7 @@ public class DatasetDownloadServletTest
         context.assertIsSatisfied();
     }
 
-    @Test
+    @Test(groups = "slow")
     public void testDoGetThumbnail() throws Exception
     {
         BufferedImage image = new BufferedImage(100, 200, BufferedImage.TYPE_INT_RGB);
diff --git a/datastore_server/sourceTest/java/ch/systemsx/cisd/openbis/dss/generic/server/plugins/standard/DataSetFileOperationsManagerTest.java b/datastore_server/sourceTest/java/ch/systemsx/cisd/openbis/dss/generic/server/plugins/standard/DataSetFileOperationsManagerTest.java
index 112a24a96654f33e9ef797d20938a0b9ff291388..c18636b565cfca0fd062e0b18508ac41ecffe232 100644
--- a/datastore_server/sourceTest/java/ch/systemsx/cisd/openbis/dss/generic/server/plugins/standard/DataSetFileOperationsManagerTest.java
+++ b/datastore_server/sourceTest/java/ch/systemsx/cisd/openbis/dss/generic/server/plugins/standard/DataSetFileOperationsManagerTest.java
@@ -225,7 +225,7 @@ public class DataSetFileOperationsManagerTest extends AbstractFileSystemTestCase
      * --< LOCAL >----------------------------------------------------------------------------------
      */
 
-    @Test
+    @Test(groups = "slow")
     public void testLocalCopyToDestination()
     {
         Properties properties = createLocalDestinationProperties();
@@ -271,7 +271,7 @@ public class DataSetFileOperationsManagerTest extends AbstractFileSystemTestCase
         context.assertIsSatisfied();
     }
 
-    @Test
+    @Test(groups = "slow")
     public void testLocalCopyToNonExistentDestination()
     {
         Properties properties = createLocalDestinationProperties();
@@ -297,7 +297,7 @@ public class DataSetFileOperationsManagerTest extends AbstractFileSystemTestCase
         context.assertIsSatisfied();
     }
 
-    @Test(dependsOnMethods = "testLocalCopyToDestination")
+    @Test(dependsOnMethods = "testLocalCopyToDestination", groups = "slow")
     public void testLocalCopyTwoDataSetsToDestination()
     {
         Properties properties = createLocalDestinationProperties();
@@ -334,7 +334,7 @@ public class DataSetFileOperationsManagerTest extends AbstractFileSystemTestCase
         context.assertIsSatisfied();
     }
 
-    @Test(dependsOnMethods = "testLocalCopyToDestination")
+    @Test(dependsOnMethods = "testLocalCopyToDestination", groups = "slow")
     public void testLocalRetrieveFromDestination()
     {
         /*
@@ -387,7 +387,7 @@ public class DataSetFileOperationsManagerTest extends AbstractFileSystemTestCase
         context.assertIsSatisfied();
     }
 
-    @Test(dependsOnMethods = "testLocalCopyToDestination")
+    @Test(dependsOnMethods = "testLocalCopyToDestination", groups = "slow")
     public void testLocalPresentInDestination()
     {
         Properties properties = createLocalDestinationProperties();
@@ -459,7 +459,7 @@ public class DataSetFileOperationsManagerTest extends AbstractFileSystemTestCase
         context.assertIsSatisfied();
     }
 
-    @Test(dependsOnMethods = "testLocalCopyToDestination")
+    @Test(dependsOnMethods = "testLocalCopyToDestination", groups = "slow")
     public void testLocalDeleteFromDestination()
     {
         /*
diff --git a/datastore_server/sourceTest/java/ch/systemsx/cisd/openbis/dss/generic/shared/utils/ImageUtilTest.java b/datastore_server/sourceTest/java/ch/systemsx/cisd/openbis/dss/generic/shared/utils/ImageUtilTest.java
index ff2ebf020401b129fd1b3a6b4cca7fa13837acf6..c4c857c1ba55d6d712ea70c1909b2a297a53e0fc 100644
--- a/datastore_server/sourceTest/java/ch/systemsx/cisd/openbis/dss/generic/shared/utils/ImageUtilTest.java
+++ b/datastore_server/sourceTest/java/ch/systemsx/cisd/openbis/dss/generic/shared/utils/ImageUtilTest.java
@@ -115,7 +115,7 @@ public class ImageUtilTest extends AssertJUnit
         assertImageSize(805, 1023, loadImageByInputStream("png-example.png"));
     }
     
-    @Test
+    @Test(groups = "slow")
     public void testTiffImage()
     {
         assertImageSize(805, 1023, loadImageByFile("tiff-example.tiff"));