diff --git a/main/tests/server/src/com/google/refine/tests/ProjectManagerStub.java b/main/tests/server/src/com/google/refine/tests/ProjectManagerStub.java
index 92f8e685f..983631935 100644
--- a/main/tests/server/src/com/google/refine/tests/ProjectManagerStub.java
+++ b/main/tests/server/src/com/google/refine/tests/ProjectManagerStub.java
@@ -35,7 +35,6 @@ package com.google.refine.tests;
 
 import java.io.IOException;
 import java.io.InputStream;
-import java.util.Map;
 
 import org.apache.tools.tar.TarOutputStream;
 
@@ -43,7 +42,6 @@ import com.google.refine.ProjectManager;
 import com.google.refine.history.HistoryEntryManager;
 import com.google.refine.model.Project;
 import com.google.refine.model.metadata.IMetadata;
-import com.google.refine.model.metadata.MetadataFormat;
 
 /**
  * Stub used to make protected methods public for testing
diff --git a/main/tests/server/src/com/google/refine/tests/expr/functions/FunctionTests.java b/main/tests/server/src/com/google/refine/tests/expr/functions/FunctionTests.java
index 31815ab96..dd185f47d 100644
--- a/main/tests/server/src/com/google/refine/tests/expr/functions/FunctionTests.java
+++ b/main/tests/server/src/com/google/refine/tests/expr/functions/FunctionTests.java
@@ -52,7 +52,6 @@ import com.google.refine.model.Cell;
 import com.google.refine.model.ModelException;
 import com.google.refine.model.Project;
 import com.google.refine.model.Row;
-import com.google.refine.model.metadata.ProjectMetadata;
 import com.google.refine.tests.RefineTest;
 
 
diff --git a/main/tests/server/src/com/google/refine/tests/expr/functions/booleans/BooleanTests.java b/main/tests/server/src/com/google/refine/tests/expr/functions/booleans/BooleanTests.java
index 6279475a4..7862688c7 100644
--- a/main/tests/server/src/com/google/refine/tests/expr/functions/booleans/BooleanTests.java
+++ b/main/tests/server/src/com/google/refine/tests/expr/functions/booleans/BooleanTests.java
@@ -50,7 +50,6 @@ import com.google.refine.model.Cell;
 import com.google.refine.model.ModelException;
 import com.google.refine.model.Project;
 import com.google.refine.model.Row;
-import com.google.refine.model.metadata.ProjectMetadata;
 import com.google.refine.tests.RefineTest;
 
 
diff --git a/main/tests/server/src/com/google/refine/tests/importers/ImporterTest.java b/main/tests/server/src/com/google/refine/tests/importers/ImporterTest.java
index 7aca54e25..46161e043 100644
--- a/main/tests/server/src/com/google/refine/tests/importers/ImporterTest.java
+++ b/main/tests/server/src/com/google/refine/tests/importers/ImporterTest.java
@@ -1,15 +1,14 @@
 package com.google.refine.tests.importers;
 
+import static org.mockito.Mockito.when;
+
 import java.io.IOException;
 import java.io.InputStream;
 import java.io.InputStreamReader;
 import java.io.Reader;
 import java.util.ArrayList;
-import java.util.LinkedList;
 import java.util.List;
 
-import static org.mockito.Mockito.when;
-import org.json.JSONArray;
 import org.json.JSONObject;
 import org.mockito.Mockito;
 
diff --git a/main/tests/server/src/com/google/refine/tests/importing/ImportingUtilitiesTests.java b/main/tests/server/src/com/google/refine/tests/importing/ImportingUtilitiesTests.java
index 9e591609c..7bcf306bc 100644
--- a/main/tests/server/src/com/google/refine/tests/importing/ImportingUtilitiesTests.java
+++ b/main/tests/server/src/com/google/refine/tests/importing/ImportingUtilitiesTests.java
@@ -15,7 +15,6 @@ import com.google.refine.importers.tree.TreeImportingParserBase;
 import com.google.refine.importing.ImportingJob;
 import com.google.refine.importing.ImportingManager;
 import com.google.refine.importing.ImportingUtilities;
-import com.google.refine.model.Column;
 import com.google.refine.model.metadata.ProjectMetadata;
 import com.google.refine.tests.importers.ImporterTest;
 import com.google.refine.util.JSONUtilities;
diff --git a/main/tests/server/src/com/google/refine/tests/model/recon/StandardReconConfigTests.java b/main/tests/server/src/com/google/refine/tests/model/recon/StandardReconConfigTests.java
index 6f02bbb46..470f1ecfe 100644
--- a/main/tests/server/src/com/google/refine/tests/model/recon/StandardReconConfigTests.java
+++ b/main/tests/server/src/com/google/refine/tests/model/recon/StandardReconConfigTests.java
@@ -2,7 +2,6 @@ package com.google.refine.tests.model.recon;
 
 import java.util.ArrayList;
 
-import org.json.JSONException;
 import org.json.JSONObject;
 import org.slf4j.LoggerFactory;
 import org.testng.Assert;
diff --git a/main/tests/server/src/com/google/refine/tests/operations/column/ColumnAdditionByFetchingURLsOperationTests.java b/main/tests/server/src/com/google/refine/tests/operations/column/ColumnAdditionByFetchingURLsOperationTests.java
index 0e834f6e4..0d28b1fc9 100644
--- a/main/tests/server/src/com/google/refine/tests/operations/column/ColumnAdditionByFetchingURLsOperationTests.java
+++ b/main/tests/server/src/com/google/refine/tests/operations/column/ColumnAdditionByFetchingURLsOperationTests.java
@@ -47,7 +47,6 @@ import org.testng.annotations.BeforeTest;
 import org.testng.annotations.Test;
 
 import com.google.refine.expr.ExpressionUtils;
-import com.google.refine.model.AbstractOperation;
 import com.google.refine.model.Cell;
 import com.google.refine.model.ModelException;
 import com.google.refine.model.Project;
diff --git a/main/tests/server/src/com/google/refine/tests/process/ProcessManagerTests.java b/main/tests/server/src/com/google/refine/tests/process/ProcessManagerTests.java
index 6a366518b..2e34388c9 100644
--- a/main/tests/server/src/com/google/refine/tests/process/ProcessManagerTests.java
+++ b/main/tests/server/src/com/google/refine/tests/process/ProcessManagerTests.java
@@ -3,9 +3,8 @@ package com.google.refine.tests.process;
 import org.testng.annotations.BeforeMethod;
 import org.testng.annotations.Test;
 
-import com.google.refine.process.LongRunningProcess;
-import com.google.refine.process.ProcessManager;
 import com.google.refine.process.Process;
+import com.google.refine.process.ProcessManager;
 import com.google.refine.tests.util.TestUtils;
 import com.google.refine.util.JSONUtilities;
 
diff --git a/main/tests/server/src/com/google/refine/tests/util/TestUtils.java b/main/tests/server/src/com/google/refine/tests/util/TestUtils.java
index e148f8252..630385195 100644
--- a/main/tests/server/src/com/google/refine/tests/util/TestUtils.java
+++ b/main/tests/server/src/com/google/refine/tests/util/TestUtils.java
@@ -5,22 +5,13 @@ import static org.junit.Assert.fail;
 
 import java.io.File;
 import java.io.IOException;
-import java.io.StringWriter;
-import java.io.Writer;
 import java.util.Properties;
 
-import org.json.JSONException;
-import org.json.JSONObject;
-import org.json.JSONWriter;
-
-import com.fasterxml.jackson.core.JsonParseException;
-import com.fasterxml.jackson.databind.JsonMappingException;
 import com.fasterxml.jackson.databind.JsonNode;
 import com.fasterxml.jackson.databind.ObjectMapper;
 
 import com.google.refine.Jsonizable;
 import com.google.refine.util.JSONUtilities;
-import com.google.refine.util.ParsingUtilities;
 
 
 public class TestUtils {