diff --git a/test.sh b/test.sh
index d205924..1574922 100755
--- a/test.sh
+++ b/test.sh
@@ -1,19 +1,4 @@
 #!/bin/bash
 
-curl -s --header "Accept: application/json" --header "Content-Type: application/json" \
-  --request POST \
-  --data '{ "type":"INDIVIDUAL","name":"Mon Tournoi", "shortName": "mon-tournoi", "startDate": "2023-05-10", "endDate": "2023-05-12", "country": "FR", "location": "Marseille", "online": false, "timeSystem": { "type": "fisher", "mainTime": "1200", "increment": "10" }, "pairing": { "type": "ROUNDROBIN" } }' \
-  http://localhost:8080/api/tour
-
-curl -s --header "Accept: application/json" http://localhost:8080/api/tour
-
-curl -s --header "Accept: application/json" http://localhost:8080/api/tour/1
-
-curl -s --header "Accept: application/json" --header "Content-Type: application/json" \
-  --request POST \
-  --data '{ "name": "Burma", "firstname": "Nestor", "rating": 1600, "rank": -2, "country": "FR", "club": "13Ma" }' \
-  http://localhost:8080/api/tour/1/part
-
-curl -s --header "Accept: application/json" http://localhost:8080/api/tour/1/part
-
-
+#mvn -Dorg.slf4j.simpleLogger.log.test=trace package verify
+mvn package verify
diff --git a/webapp/pom.xml b/webapp/pom.xml
index 0508430..6a09c33 100644
--- a/webapp/pom.xml
+++ b/webapp/pom.xml
@@ -97,6 +97,11 @@
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-surefire-plugin</artifactId>
+                <configuration>
+                    <classpathDependencyExcludes>
+                        <classpathDependencyExclude>com.republicate:webapp-slf4j-logger</classpathDependencyExclude>
+                    </classpathDependencyExcludes>
+                </configuration>
             </plugin>
         </plugins>
     </build>
@@ -169,6 +174,12 @@
             <version>3.0</version>
             <scope>runtime</scope>
         </dependency>
+        <dependency>
+            <groupId>org.slf4j</groupId>
+            <artifactId>slf4j-simple</artifactId>
+            <version>${slf4j.version}</version>
+            <scope>test</scope>
+        </dependency>
         <!--
         <dependency>
             <groupId>org.slf4j</groupId>
diff --git a/webapp/src/main/kotlin/org/jeudego/pairgoth/model/Pairable.kt b/webapp/src/main/kotlin/org/jeudego/pairgoth/model/Pairable.kt
index 0b03575..1cad609 100644
--- a/webapp/src/main/kotlin/org/jeudego/pairgoth/model/Pairable.kt
+++ b/webapp/src/main/kotlin/org/jeudego/pairgoth/model/Pairable.kt
@@ -8,7 +8,7 @@ import kotlin.math.roundToInt
 
 // Pairable
 
-sealed class Pairable(val id: Int, val name: String, open val rating: Double, open val rank: Int) {
+sealed class Pairable(val id: Int, val name: String, open val rating: Int, open val rank: Int) {
     abstract fun toJson(): Json.Object
     val skip = mutableSetOf<Int>() // skipped rounds
 }
@@ -40,7 +40,7 @@ class Player(
     id: Int,
     name: String,
     var firstname: String,
-    rating: Double,
+    rating: Int,
     rank: Int,
     var country: String,
     var club: String
@@ -48,7 +48,7 @@ class Player(
     companion object
     // used to store external IDs ("FFG" => FFG ID, "EGF" => EGF PIN, "AGA" => AGA ID ...)
     val externalIds = mutableMapOf<String, String>()
-    override fun toJson() = Json.Object(
+    override fun toJson(): Json.Object = Json.MutableObject(
         "id" to id,
         "name" to name,
         "firstname" to firstname,
@@ -56,25 +56,32 @@ class Player(
         "rank" to rank,
         "country" to country,
         "club" to club
-    )
+    ).also {
+        if (skip.isNotEmpty()) it["skip"] = Json.Array(skip)
+    }
 }
 
 fun Player.Companion.fromJson(json: Json.Object, default: Player? = null) = Player(
     id = json.getInt("id") ?: default?.id ?: Store.nextPlayerId,
     name = json.getString("name") ?: default?.name ?: badRequest("missing name"),
     firstname = json.getString("firstname") ?: default?.firstname ?: badRequest("missing firstname"),
-    rating = json.getDouble("rating") ?: default?.rating ?: badRequest("missing rating"),
+    rating = json.getInt("rating") ?: default?.rating ?: badRequest("missing rating"),
     rank = json.getInt("rank") ?: default?.rank ?: badRequest("missing rank"),
     country = json.getString("country") ?: default?.country ?: badRequest("missing country"),
     club = json.getString("club") ?: default?.club ?: badRequest("missing club")
-)
+).also { player ->
+    player.skip.clear()
+    json.getArray("skip")?.let {
+        if (it.isNotEmpty()) player.skip.addAll(it.map { id -> (id as Number).toInt() })
+    }
+}
 
 // Team
 
-class Team(id: Int, name: String): Pairable(id, name, 0.0, 0) {
+class Team(id: Int, name: String): Pairable(id, name, 0, 0) {
     companion object {}
     val players = mutableSetOf<Player>()
-    override val rating: Double get() = if (players.isEmpty()) super.rating else players.sumOf { player -> player.rating } / players.size
+    override val rating: Int get() = if (players.isEmpty()) super.rating else (players.sumOf { player -> player.rating.toDouble() } / players.size).roundToInt()
     override val rank: Int get() = if (players.isEmpty()) super.rank else (players.sumOf { player -> player.rank.toDouble() } / players.size).roundToInt()
     override fun toJson() = Json.Object(
         "id" to id,
diff --git a/webapp/src/main/kotlin/org/jeudego/pairgoth/web/ApiServlet.kt b/webapp/src/main/kotlin/org/jeudego/pairgoth/web/ApiServlet.kt
index 31ae69a..d2e6fff 100644
--- a/webapp/src/main/kotlin/org/jeudego/pairgoth/web/ApiServlet.kt
+++ b/webapp/src/main/kotlin/org/jeudego/pairgoth/web/ApiServlet.kt
@@ -114,9 +114,9 @@ class ApiServlet : HttpServlet() {
             builder.append(response.status).append(' ')
                 .append(reason)
             if (response.status == HttpServletResponse.SC_INTERNAL_SERVER_ERROR) {
-                logger.info(red(">> {}"), builder.toString())
+                logger.trace(red(">> {}"), builder.toString())
             } else {
-                logger.info(green(">> {}"), builder.toString())
+                logger.trace(green(">> {}"), builder.toString())
             }
 
             // CB TODO - should be bufferized and asynchronously written in synchronous chunks
diff --git a/webapp/src/main/kotlin/org/jeudego/pairgoth/web/Logging.kt b/webapp/src/main/kotlin/org/jeudego/pairgoth/web/Logging.kt
index d9fce48..22ba455 100644
--- a/webapp/src/main/kotlin/org/jeudego/pairgoth/web/Logging.kt
+++ b/webapp/src/main/kotlin/org/jeudego/pairgoth/web/Logging.kt
@@ -25,7 +25,7 @@ fun Logger.logRequest(req: HttpServletRequest, logHeaders: Boolean = false) {
     }
     // builder.append(' ').append(req.getProtocol());
     info(blue("<< {}"), builder.toString())
-    if (logHeaders) {
+    if (isTraceEnabled && logHeaders) {
         // CB TODO - should be bufferized and asynchronously written in synchronous chunks
         // so that header lines from parallel requests are not mixed up in the logs ;
         // synchronizing the whole request log is not desirable
@@ -33,7 +33,7 @@ fun Logger.logRequest(req: HttpServletRequest, logHeaders: Boolean = false) {
         while (headerNames.hasMoreElements()) {
             val name = headerNames.nextElement()
             val value = req.getHeader(name)
-            info(blue("<<     {}: {}"), name, value)
+            trace(blue("<<     {}: {}"), name, value)
         }
     }
 }
diff --git a/webapp/src/test/kotlin/BasicTests.kt b/webapp/src/test/kotlin/BasicTests.kt
index e10e0a9..6187225 100644
--- a/webapp/src/test/kotlin/BasicTests.kt
+++ b/webapp/src/test/kotlin/BasicTests.kt
@@ -11,7 +11,7 @@ import kotlin.test.assertTrue
 
 @TestMethodOrder(Alphanumeric::class)
 @TestInstance(TestInstance.Lifecycle.PER_CLASS)
-class BasicTests() {
+class BasicTests: TestBase() {
 
     val aTournament = Json.Object(
         "type" to "INDIVIDUAL",
@@ -32,20 +32,47 @@ class BasicTests() {
         )
     )
 
+    val aPlayer = Json.Object(
+        "name" to "Burma",
+        "firstname" to "Nestor",
+        "rating" to 1600,
+        "rank" to -2,
+        "country" to "FR",
+        "club" to "13Ma"
+    )
+
     @Test
     fun `001 create tournament`() {
-        val resp = TestAPI.post("/api/tour", aTournament)
-        assertTrue(resp.isObject, "Json object expected")
-        assertTrue(resp.asObject().getBoolean("success") == true, "expecting success")
+        val resp = TestAPI.post("/api/tour", aTournament) as Json.Object
+        assertTrue(resp.getBoolean("success") == true, "expecting success")
     }
 
     @Test
     fun `002 get tournament`() {
-        val resp = TestAPI.get("/api/tour/1")
-        assertTrue(resp.isObject, "Json object expected")
-        assertEquals(1, resp.asObject().getInt("id"), "First tournament should have id #1")
+        val resp = TestAPI.get("/api/tour/1") as Json.Object
+        assertEquals(1, resp.getInt("id"), "First tournament should have id #1")
         // filter out "id", and also "komi", "rules" and "gobanSize" which were provided by default
-        val cmp = Json.Object(*resp.asObject().entries.filter { it.key !in listOf("id", "komi", "rules", "gobanSize") }.map { Pair(it.key, it.value) }.toTypedArray())
+        val cmp = Json.Object(*resp.entries.filter { it.key !in listOf("id", "komi", "rules", "gobanSize") }.map { Pair(it.key, it.value) }.toTypedArray())
         assertEquals(aTournament.toString(), cmp.toString(), "tournament differs")
     }
+
+    @Test
+    fun `003 register user`() {
+        val resp = TestAPI.post("/api/tour/1/part", aPlayer) as Json.Object
+        assertTrue(resp.getBoolean("success") == true, "expecting success")
+        val players = TestAPI.get("/api/tour/1/part") as Json.Array
+        val player = players[0] as Json.Object
+        assertEquals(1, player.getInt("id"), "First player should have id #1")
+        // filter out "id"
+        val cmp = Json.Object(*player.entries.filter { it.key != "id" }.map { Pair(it.key, it.value) }.toTypedArray())
+        assertEquals(aPlayer.toString(), cmp.toString(), "player differs")
+    }
+
+    @Test
+    fun `004 modify user`() {
+        val resp = TestAPI.put("/api/tour/1/part/1", Json.Object("skip" to Json.Array(1))) as Json.Object
+        assertTrue(resp.getBoolean("success") == true, "expecting success")
+        val player = TestAPI.get("/api/tour/1/part/1") as Json.Object
+        assertEquals("[1]", player.getArray("skip").toString(), "First player should have id #1")
+    }
 }
diff --git a/webapp/src/test/kotlin/TestBase.kt b/webapp/src/test/kotlin/TestBase.kt
new file mode 100644
index 0000000..c77cb07
--- /dev/null
+++ b/webapp/src/test/kotlin/TestBase.kt
@@ -0,0 +1,25 @@
+package org.jeudego.pairgoth.test
+
+import org.junit.jupiter.api.BeforeAll
+import org.junit.jupiter.api.BeforeEach
+import org.junit.jupiter.api.TestInfo
+import org.slf4j.LoggerFactory
+
+abstract class TestBase {
+    companion object {
+        val logger = LoggerFactory.getLogger("test")
+        private var testClassName: String? = null
+
+        @BeforeAll
+        @JvmStatic
+        fun prepare() {
+            testClassName = this::class.simpleName
+        }
+    }
+
+    @BeforeEach
+    fun before(testInfo: TestInfo) {
+        val testName = testInfo.displayName.removeSuffix("()")
+        logger.info("===== Running $testClassName.$testName =====")
+    }
+}
\ No newline at end of file
diff --git a/webapp/src/test/kotlin/TestUtils.kt b/webapp/src/test/kotlin/TestUtils.kt
index 4436b5e..a4e7166 100644
--- a/webapp/src/test/kotlin/TestUtils.kt
+++ b/webapp/src/test/kotlin/TestUtils.kt
@@ -40,9 +40,9 @@ object TestAPI {
             on { setAttribute(eq(ApiHandler.SELECTOR_KEY), selector.capture()) } doAnswer {}
             on { setAttribute(eq(ApiHandler.SUBSELECTOR_KEY), subSelector.capture()) } doAnswer {}
             on { setAttribute(eq(ApiHandler.PAYLOAD_KEY), reqPayload.capture()) } doAnswer {}
-            on { getAttribute(ApiHandler.SELECTOR_KEY) } doAnswer { selector.lastValue }
-            on { getAttribute(ApiHandler.SUBSELECTOR_KEY) } doAnswer { subSelector.lastValue }
-            on { getAttribute(ApiHandler.PAYLOAD_KEY) } doAnswer { reqPayload.lastValue }
+            on { getAttribute(ApiHandler.SELECTOR_KEY) } doAnswer { selector.allValues.lastOrNull() }
+            on { getAttribute(ApiHandler.SUBSELECTOR_KEY) } doAnswer { subSelector.allValues.lastOrNull() }
+            on { getAttribute(ApiHandler.PAYLOAD_KEY) } doAnswer { reqPayload.allValues.lastOrNull() }
             on { reader } doReturn myReader
             on { scheme } doReturn "http"
             on { localName } doReturn "pairgoth"