diff --git a/src/tests/flows/layout.ts b/src/tests/flows/layout.ts
index 0abf4f4..866a917 100644
--- a/src/tests/flows/layout.ts
+++ b/src/tests/flows/layout.ts
@@ -12,7 +12,7 @@ tests.register("Focus and move windows", 1, () => {
 
     function testLayout(shortcutName: string, grid: KwinClient[][]) {
         qtMock.fireShortcut(shortcutName);
-        Assert.grid(config, screen, grid, { skip: 1 });
+        Assert.centeredGrid(config, screen, 100, grid, { skip: 1 });
     }
 
     function testFocus(shortcutName: string, expectedFocus: KwinClient) {
diff --git a/src/tests/flows/lazyScroller.ts b/src/tests/flows/lazyScroller.ts
new file mode 100644
index 0000000..11a2517
--- /dev/null
+++ b/src/tests/flows/lazyScroller.ts
@@ -0,0 +1,10 @@
+// tests.register("LazyScroller", 100, () => {
+//     const config = getDefaultConfig();
+//     config.scrollingLazy = true;
+//     config.scrollingCentered = false;
+//     config.scrollingGrouped = false;
+//     const { qtMock, workspaceMock, world } = init(config);
+
+//     const client1 = workspaceMock.createClientsWithWidths(300);
+//     Assert.centeredGrid()
+// });
diff --git a/src/tests/flows/pinning.ts b/src/tests/flows/pinning.ts
index 253f54d..f72e633 100644
--- a/src/tests/flows/pinning.ts
+++ b/src/tests/flows/pinning.ts
@@ -6,34 +6,34 @@ tests.register("Pin", 20, () => {
     const screenHalfRight = new MockQmlRect(screen.width/2, 0, screen.width/2, screen.height);
 
     const [pinned, tiled1, tiled2] = workspaceMock.createClients(3);
-    Assert.grid(config, screen, [ [pinned], [tiled1], [tiled2] ]);
+    Assert.centeredGrid(config, screen, 100, [ [pinned], [tiled1], [tiled2] ]);
 
     pinned.pin(screenHalfLeft);
     Assert.equalRects(pinned.frameGeometry, screenHalfLeft);
-    Assert.grid(config, screenHalfRight, [ [tiled1], [tiled2] ]);
+    Assert.centeredGrid(config, screenHalfRight, 100, [ [tiled1], [tiled2] ]);
 
     pinned.pin(screenHalfRight);
     Assert.equalRects(pinned.frameGeometry, screenHalfRight);
-    Assert.grid(config, screenHalfLeft, [ [tiled1], [tiled2] ]);
+    Assert.centeredGrid(config, screenHalfLeft, 100, [ [tiled1], [tiled2] ]);
 
     pinned.unpin();
     Assert.equalRects(pinned.frameGeometry, screenHalfRight);
-    Assert.grid(config, screen, [ [tiled1], [tiled2] ]);
+    Assert.centeredGrid(config, screen, 100, [ [tiled1], [tiled2] ]);
 
     pinned.pin(screenHalfRight);
     Assert.equalRects(pinned.frameGeometry, screenHalfRight);
-    Assert.grid(config, screenHalfLeft, [ [tiled1], [tiled2] ]);
+    Assert.centeredGrid(config, screenHalfLeft, 100, [ [tiled1], [tiled2] ]);
 
     pinned.minimized = true;
-    Assert.grid(config, screen, [ [tiled1], [tiled2] ]);
+    Assert.centeredGrid(config, screen, 100, [ [tiled1], [tiled2] ]);
 
     pinned.minimized = false;
     Assert.equalRects(pinned.frameGeometry, screenHalfRight);
-    Assert.grid(config, screenHalfLeft, [ [tiled1], [tiled2] ]);
+    Assert.centeredGrid(config, screenHalfLeft, 100, [ [tiled1], [tiled2] ]);
 
     workspaceMock.activeWindow = pinned;
     qtMock.fireShortcut("karousel-window-toggle-floating");
     Assert.assert(pinned.tile === null);
     pinned.frameGeometry = new MockQmlRect(10, 20, 100, 200); // This is needed because the window's preferredWidth can change when pinning, because frameGeometryChanged can fire before tileChanged. TODO: Ensure pinned window keeps its preferredWidth.
-    Assert.grid(config, screen, [ [tiled1], [tiled2], [pinned] ]);
+    Assert.centeredGrid(config, screen, 100, [ [tiled1], [tiled2], [pinned] ]);
 });
diff --git a/src/tests/utils/Assert.ts b/src/tests/utils/Assert.ts
index 372c1bc..740b274 100644
--- a/src/tests/utils/Assert.ts
+++ b/src/tests/utils/Assert.ts
@@ -123,21 +123,22 @@ namespace Assert {
         );
     }
 
-    export function grid(
+    export function centeredGrid(
         config: Config,
         screen: QmlRect,
+        columnWidth: number,
         grid: KwinClient[][],
         { message, skip=0 }: Options = {},
     ) {
-        // assumes uniformly sized windows within columns of width 100
+        // assumes uniformly sized windows within columns of uniform width
         function getRectInGrid(column: number, window: number, nColumns: number, nWindows: number) {
             const columnHeight = screen.height - config.gapsOuterTop - config.gapsOuterBottom;
-            const columnsWidth = nColumns * 100 + (nColumns-1) * config.gapsInnerHorizontal;
+            const columnsWidth = nColumns * columnWidth + (nColumns-1) * config.gapsInnerHorizontal;
             const windowHeight = (columnHeight - config.gapsInnerVertical * (nWindows-1)) / nWindows;
             return new MockQmlRect(
-                screen.x + column * (100 + config.gapsInnerHorizontal) + (screen.width-columnsWidth) / 2,
+                screen.x + column * (columnWidth + config.gapsInnerHorizontal) + (screen.width-columnsWidth) / 2,
                 screen.y + config.gapsOuterTop + (windowHeight + config.gapsInnerVertical) * window,
-                100,
+                columnWidth,
                 (columnHeight - config.gapsInnerVertical * (nWindows-1)) / nWindows,
             );
         }