diff --git a/app/qml/main.qml b/app/qml/main.qml
index 9e17f9ad..7dfcbc80 100644
--- a/app/qml/main.qml
+++ b/app/qml/main.qml
@@ -165,6 +165,10 @@ ApplicationWindow {
                     project.uiState.value("mainSplitViewState")))
                 panelSplitView.restoreState(project.uiState.base64ToBinary(
                     project.uiState.value("panelSplitViewState")))
+            } else {
+                // We should still restore the default sizes for all other cases, though.
+                // We only need to restore panelSplitView's preferredWidth, as mainSplitView fills.
+                panelSplitView.SplitView.preferredWidth = panelSplitView.defaultPreferredWidth
             }
         }
     }
@@ -224,8 +228,10 @@ ApplicationWindow {
                 implicitHeight: 4
             }
 
+            readonly property int defaultPreferredWidth: 240
+
             SplitView.minimumWidth: 200
-            SplitView.preferredWidth: 240
+            SplitView.preferredWidth: defaultPreferredWidth
             SplitView.maximumWidth: window.width / 3
 
             Ui.ColourPanel {
diff --git a/tests/auto/tst_app.cpp b/tests/auto/tst_app.cpp
index 3e032352..d4d9e49c 100644
--- a/tests/auto/tst_app.cpp
+++ b/tests/auto/tst_app.cpp
@@ -65,6 +65,7 @@ private Q_SLOTS:
     void recentFiles();
     void newProjectSizeFromClipboard_data();
     void newProjectSizeFromClipboard();
+    void splitViewStateAcrossProjects();
 
     // Tools, misc.
     void animationPlayback_data();
@@ -246,7 +247,6 @@ void tst_App::repeatedNewProject()
 {
     QFETCH(ProjectTypeVector, projectTypes);
 
-    int i = -1;
     foreach (auto projectType, projectTypes) {
         // Shouldn't crash on repeated opening of new projects.
         QVERIFY2(createNewProject(projectType), failureMessage);
@@ -770,6 +770,35 @@ void tst_App::newProjectSizeFromClipboard()
     QTRY_VERIFY(!newImageProjectPopup->property("visible").toBool());
 }
 
+void tst_App::splitViewStateAcrossProjects()
+{
+    QVERIFY2(createNewLayeredImageProject(), failureMessage);
+
+    // Make the panel split item larger.
+    QPointer<QQuickItem> mainSplitView = window->findChild<QQuickItem*>("mainSplitView");
+    QVERIFY(mainSplitView);
+    QPointer<QQuickItem> panelSplitView = window->findChild<QQuickItem*>("panelSplitView");
+    QVERIFY(panelSplitView);
+    const qreal defaultPanelSplitItemWidth = panelSplitView->width();
+    QPointer<QQuickItem> mainSplitViewHandle = findSplitViewHandle("mainSplitView", 0);
+    QVERIFY(mainSplitViewHandle);
+    const QPoint mainSplitViewHandleCentreAfterMoving = QPoint(
+        mainSplitView->width() / 2, mainSplitView->height() / 2);
+    QVERIFY2(dragSplitViewHandle("mainSplitView", 0, mainSplitViewHandleCentreAfterMoving), failureMessage);
+    const qreal resizedPanelSplitItemWidth = panelSplitView->width();
+    QVERIFY(resizedPanelSplitItemWidth > defaultPanelSplitItemWidth);
+
+    // Save the project with the new split size.
+    QVERIFY(layeredImageProject->canSave());
+    const QUrl saveUrl = QUrl::fromLocalFile(tempProjectDir->path() + QLatin1String("/splitViewStateAcrossProjects.slp"));
+    layeredImageProject->saveAs(saveUrl);
+    QVERIFY(!layeredImageProject->hasUnsavedChanges());
+
+    // Create a new project. It should have the default panel split item size.
+    QVERIFY2(createNewLayeredImageProject(), failureMessage);
+    QCOMPARE(panelSplitView->width(), defaultPanelSplitItemWidth);
+}
+
 void tst_App::animationPlayback_data()
 {
     addImageProjectTypes();
@@ -888,7 +917,6 @@ void tst_App::animationPlayback()
     // Save.
     const QUrl saveUrl = QUrl::fromLocalFile(tempProjectDir->path() + QLatin1String("/animationStuffSaved.slp"));
     layeredImageProject->saveAs(saveUrl);
-    QVERIFY_NO_CREATION_ERRORS_OCCURRED();
     QVERIFY(!layeredImageProject->hasUnsavedChanges());
 
     // Close.
diff --git a/tests/shared/testhelper.cpp b/tests/shared/testhelper.cpp
index baa3af3b..80be6357 100644
--- a/tests/shared/testhelper.cpp
+++ b/tests/shared/testhelper.cpp
@@ -1995,13 +1995,6 @@ bool TestHelper::updateVariables(bool isNewProject, Project::Type projectType)
         return false;
 
     if (isNewProject) {
-        // If we're not loading a saved project (where we'd want to use the saved split sizes),
-        // return the SplitView back to roughly its original size.
-        // It doesn't matter if it's not perfect, it's just important that it's not already
-        // at its max width so that the tests can resize it.
-        if (!dragSplitViewHandle("mainSplitView", 0, QPoint(window->width() - 240, window->height() / 2)))
-            return false;
-
         // Restore the colour panel's contentY to the default.
         QQuickItem *colourPanelFlickable = window->findChild<QQuickItem*>("colourPanelFlickable");
         VERIFY(colourPanelFlickable);