diff --git a/corese-server/src/test/java/fr/inria/corese/server/webservice/HTTPConnectionUtils.java b/corese-server/src/test/java/fr/inria/corese/server/webservice/HTTPConnectionUtils.java
new file mode 100644
index 000000000..daef3b068
--- /dev/null
+++ b/corese-server/src/test/java/fr/inria/corese/server/webservice/HTTPConnectionUtils.java
@@ -0,0 +1,90 @@
+package fr.inria.corese.server.webservice;
+
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.io.InputStreamReader;
+import java.net.HttpURLConnection;
+import java.net.MalformedURLException;
+import java.net.ProtocolException;
+import java.net.URL;
+import java.util.ArrayList;
+import java.util.List;
+
+public class HTTPConnectionUtils {
+
+    /**
+     * Get a connection to a server.
+     * 
+     * @param url     server URL
+     * @param headers HTTP headers
+     * @return
+     * @throws MalformedURLException
+     * @throws IOException
+     * @throws ProtocolException
+     */
+    
+    public static HttpURLConnection methodConnection(String method, String url, List<List<String>> headers)
+    throws IOException {
+        URL u = new URL(url);
+        HttpURLConnection con = (HttpURLConnection) u.openConnection();
+        con.setRequestMethod(method);
+        con.setConnectTimeout(5000);
+        con.setReadTimeout(5000);
+        con.setInstanceFollowRedirects(true);
+        for (List<String> header : headers) {
+            con.setRequestProperty(header.get(0), header.get(1));
+        }
+        return con;
+    }
+
+    public static HttpURLConnection getConnection(String url, List<List<String>> headers)
+            throws IOException {
+        return methodConnection("GET", url, headers);
+    }
+
+    public static HttpURLConnection postConnection(String url, List<List<String>> headers, String body)
+            throws IOException {
+        HttpURLConnection con = methodConnection("POST", url, headers);
+        con.setDoOutput(true);
+        con.getOutputStream().write(body.getBytes());
+        return con;
+    }
+
+    public static HttpURLConnection postUrlencodedConnection(String url, List<List<String>> headers, String body)
+            throws IOException {
+        List<List<String>> newHeaders = new ArrayList<>(headers);
+        List<String> contentTypeHeader = new ArrayList<>();
+        contentTypeHeader.add("Content-Type");
+        contentTypeHeader.add("application/x-www-form-urlencoded");
+        newHeaders.add(contentTypeHeader);
+        return postConnection(url, newHeaders, body);
+    }
+
+    public static HttpURLConnection putConnection(String url, List<List<String>> headers, String body)
+            throws IOException {
+        HttpURLConnection con = methodConnection("PUT", url, headers);
+        con.setDoOutput(true);
+        con.getOutputStream().write(body.getBytes());
+        return con;
+    }
+
+    public static HttpURLConnection deleteConnection(String url, List<List<String>> headers)
+            throws IOException {
+        return methodConnection("DELETE", url, headers);
+    }
+
+    public static HttpURLConnection deleteConnection(String url)
+            throws IOException {
+        return deleteConnection( url, new ArrayList<>());
+    }
+
+    public static HttpURLConnection headConnection(String url, List<List<String>> headers)
+            throws IOException {
+        return methodConnection("HEAD", url, headers);
+    }
+
+    public static HttpURLConnection headConnection(String url)
+            throws IOException {
+        return headConnection(url, new ArrayList<>());
+    }
+}
diff --git a/corese-server/src/test/java/fr/inria/corese/server/webservice/SPARQLTestUtils.java b/corese-server/src/test/java/fr/inria/corese/server/webservice/SPARQLTestUtils.java
index 1ef1e5f4e..a4e07e9f2 100644
--- a/corese-server/src/test/java/fr/inria/corese/server/webservice/SPARQLTestUtils.java
+++ b/corese-server/src/test/java/fr/inria/corese/server/webservice/SPARQLTestUtils.java
@@ -7,14 +7,10 @@
 
 import java.io.BufferedReader;
 import java.io.ByteArrayInputStream;
-import java.io.IOException;
 import java.io.InputStream;
 import java.io.InputStreamReader;
 import java.io.UnsupportedEncodingException;
 import java.net.HttpURLConnection;
-import java.net.MalformedURLException;
-import java.net.ProtocolException;
-import java.net.URL;
 import java.net.URLEncoder;
 import java.nio.charset.StandardCharsets;
 import java.util.ArrayList;
@@ -37,82 +33,6 @@ public class SPARQLTestUtils {
     private static final String SERVER_URL = "http://localhost:8080/";
     private static final String SPARQL_ENDPOINT_URL = SERVER_URL + "sparql";
 
-    /**
-     * Get a connection to a server.
-     * 
-     * @param url     server URL
-     * @param headers HTTP headers
-     * @return
-     * @throws MalformedURLException
-     * @throws IOException
-     * @throws ProtocolException
-     */
-
-    public static HttpURLConnection methodConnection(String method, String url, List<List<String>> headers)
-    throws IOException {
-        URL u = new URL(url);
-        HttpURLConnection con = (HttpURLConnection) u.openConnection();
-        con.setRequestMethod(method);
-        con.setConnectTimeout(5000);
-        con.setReadTimeout(5000);
-        con.setInstanceFollowRedirects(true);
-        for (List<String> header : headers) {
-            con.setRequestProperty(header.get(0), header.get(1));
-        }
-        return con;
-    }
-
-    public static HttpURLConnection getConnection(String url, List<List<String>> headers)
-            throws IOException {
-        return methodConnection("GET", url, headers);
-    }
-
-    public static HttpURLConnection postConnection(String url, List<List<String>> headers, String body)
-            throws IOException {
-        HttpURLConnection con = methodConnection("POST", url, headers);
-        con.setDoOutput(true);
-        con.getOutputStream().write(body.getBytes());
-        return con;
-    }
-
-    public static HttpURLConnection postUrlencodedConnection(String url, List<List<String>> headers, String body)
-            throws IOException {
-        List<List<String>> newHeaders = new ArrayList<>(headers);
-        List<String> contentTypeHeader = new ArrayList<>();
-        contentTypeHeader.add("Content-Type");
-        contentTypeHeader.add("application/x-www-form-urlencoded");
-        newHeaders.add(contentTypeHeader);
-        return postConnection(url, newHeaders, body);
-    }
-
-    public static HttpURLConnection putConnection(String url, List<List<String>> headers, String body)
-            throws IOException {
-        HttpURLConnection con = methodConnection("PUT", url, headers);
-        con.setDoOutput(true);
-        con.getOutputStream().write(body.getBytes());
-        return con;
-    }
-
-    public static HttpURLConnection deleteConnection(String url, List<List<String>> headers)
-            throws IOException {
-        return methodConnection("DELETE", url, headers);
-    }
-
-    public static HttpURLConnection deleteConnection(String url)
-            throws IOException {
-        return deleteConnection( url, new ArrayList<>());
-    }
-
-    public static HttpURLConnection headConnection(String url, List<List<String>> headers)
-            throws IOException {
-        return methodConnection("HEAD", url, headers);
-    }
-
-    public static HttpURLConnection headConnection(String url)
-            throws IOException {
-        return headConnection(url, new ArrayList<>());
-    }
-
     public static String generateSPARQLQueryParameters(String query, List<List<String>> optionalParameters) {
         return generateSPARQLParameters("query", query, optionalParameters);
     }
@@ -166,7 +86,7 @@ public static Mappings sendSPARQLSelect(String query) throws Exception {
         headers.add(acceptHeader);
 
         String urlQuery = SPARQL_ENDPOINT_URL + "?" + SPARQLTestUtils.generateSPARQLQueryParameters(query);
-        HttpURLConnection con = SPARQLTestUtils.getConnection(urlQuery, headers);
+        HttpURLConnection con = HTTPConnectionUtils.getConnection(urlQuery, headers);
 
         BufferedReader in = new BufferedReader(
                 new InputStreamReader(con.getInputStream()));
@@ -190,7 +110,7 @@ public static boolean sendSPARQLAsk(String query) throws Exception {
         headers.add(acceptHeader);
 
         String urlQuery = SPARQL_ENDPOINT_URL + "?" + SPARQLTestUtils.generateSPARQLQueryParameters(query);
-        HttpURLConnection con = SPARQLTestUtils.getConnection(urlQuery, headers);
+        HttpURLConnection con = HTTPConnectionUtils.getConnection(urlQuery, headers);
 
         BufferedReader in = new BufferedReader(
                 new InputStreamReader(con.getInputStream()));
@@ -214,7 +134,7 @@ public static Graph sendSPARQLConstructDescribe(String query) throws Exception {
         headers.add(acceptHeader);
 
         String urlQuery = SPARQL_ENDPOINT_URL + "?" + SPARQLTestUtils.generateSPARQLQueryParameters(query);
-        HttpURLConnection con = SPARQLTestUtils.getConnection(urlQuery, headers);
+        HttpURLConnection con = HTTPConnectionUtils.getConnection(urlQuery, headers);
 
         BufferedReader in = new BufferedReader(
                 new InputStreamReader(con.getInputStream()));