diff --git a/tests/arthur/common/baselineprotocol.cpp b/tests/arthur/common/baselineprotocol.cpp
index d5e533abbad..8879b786707 100644
--- a/tests/arthur/common/baselineprotocol.cpp
+++ b/tests/arthur/common/baselineprotocol.cpp
@@ -424,15 +424,17 @@ bool BaselineProtocol::requestBaselineChecksums(const QString &testFunction, Ima
         it->testFunction = testFunction;
 
     QByteArray block;
-    QDataStream ds(&block, QIODevice::ReadWrite);
+    QDataStream ds(&block, QIODevice::WriteOnly);
     ds << *itemList;
     if (!sendBlock(RequestBaselineChecksums, block))
         return false;
+
     Command cmd;
-    if (!receiveBlock(&cmd, &block))
+    QByteArray rcvBlock;
+    if (!receiveBlock(&cmd, &rcvBlock) || cmd != BaselineProtocol::Ack)
         return false;
-    ds.device()->seek(0);
-    ds >> *itemList;
+    QDataStream rds(&rcvBlock, QIODevice::ReadOnly);
+    rds >> *itemList;
     return true;
 }
 
diff --git a/tests/arthur/common/baselineprotocol.h b/tests/arthur/common/baselineprotocol.h
index 8a99ace6ee8..bc1a3eb7b62 100644
--- a/tests/arthur/common/baselineprotocol.h
+++ b/tests/arthur/common/baselineprotocol.h
@@ -146,7 +146,7 @@ public:
     enum Constant {
         ProtocolVersion = 5,
         ServerPort = 54129,
-        Timeout = 5000
+        Timeout = 15000
     };
 
     enum Command {
diff --git a/tests/auto/lancelot/tst_lancelot.cpp b/tests/auto/lancelot/tst_lancelot.cpp
index 972166514a5..2eb3f200edf 100644
--- a/tests/auto/lancelot/tst_lancelot.cpp
+++ b/tests/auto/lancelot/tst_lancelot.cpp
@@ -254,7 +254,8 @@ void tst_Lancelot::runTestSuite(GraphicsEngine engine, QImage::Format format)
 
 
     if (baseline.status == ImageItem::BaselineNotFound) {
-        proto.submitNewBaseline(rendered, 0);
+        if (!proto.submitNewBaseline(rendered, 0))
+            QWARN("Failed to submit new baseline: " + proto.errorMessage().toLatin1());
         QSKIP("Baseline not found; new baseline created.", SkipSingle);
     }