diff --git a/src/tests/flows/externalResize.ts b/src/tests/flows/externalResize.ts
index fcfc5b0..27a6264 100644
--- a/src/tests/flows/externalResize.ts
+++ b/src/tests/flows/externalResize.ts
@@ -8,7 +8,7 @@ tests.register("External resize", 1, () => {
 
     function getTiledFrame(width: number) {
         return new MockQmlRect(
-            Math.round((screen.width - width) / 2),
+            tilingArea.left + Math.round((tilingArea.width - width) / 2),
             tilingArea.top,
             width,
             tilingArea.height,
diff --git a/src/tests/flows/maximization.ts b/src/tests/flows/maximization.ts
index 888aa90..f3ce417 100644
--- a/src/tests/flows/maximization.ts
+++ b/src/tests/flows/maximization.ts
@@ -7,7 +7,7 @@ tests.register("Maximization", 100, () => {
         Assert.assert(clientManager.hasClient(kwinClient));
     });
 
-    const columnLeftX = screen.width/2 - 300/2;
+    const columnLeftX = tilingArea.left + tilingArea.width/2 - 300/2;
     const columnTopY = tilingArea.top;
     const columnHeight = tilingArea.height;
     Assert.rect(kwinClient.frameGeometry, columnLeftX, columnTopY, 300, columnHeight);
@@ -66,7 +66,7 @@ tests.register("Re-maximize disabled", 100, () => {
     });
 
     const columnsWidth = 300 + 400 + config.gapsInnerHorizontal;
-    const column1LeftX = screen.width/2 - columnsWidth/2;
+    const column1LeftX = tilingArea.left + tilingArea.width/2 - columnsWidth/2;
     const column2LeftX = column1LeftX + 300 + config.gapsInnerHorizontal;
     const columnTopY = tilingArea.top;
     const columnHeight = tilingArea.height;
@@ -111,7 +111,7 @@ tests.register("Re-maximize enabled", 100, () => {
     });
 
     const columnsWidth = 300 + 400 + config.gapsInnerHorizontal;
-    const column1LeftX = screen.width/2 - columnsWidth/2;
+    const column1LeftX = tilingArea.left + tilingArea.width/2 - columnsWidth/2;
     const column2LeftX = column1LeftX + 300 + config.gapsInnerHorizontal;
     const columnTopY = tilingArea.top;
     const columnHeight = tilingArea.height;
diff --git a/src/tests/flows/presetWidths.ts b/src/tests/flows/presetWidths.ts
index 5205de7..597136d 100644
--- a/src/tests/flows/presetWidths.ts
+++ b/src/tests/flows/presetWidths.ts
@@ -7,7 +7,7 @@ tests.register("Preset Widths default", 1, () => {
 
     function getRect(columnWidth: number) {
         return new MockQmlRect(
-            (screen.width - columnWidth) / 2,
+            tilingArea.left + (tilingArea.width - columnWidth) / 2,
             tilingArea.top,
             columnWidth,
             tilingArea.height,
@@ -43,7 +43,7 @@ tests.register("Preset Widths custom", 1, () => {
 
     function getRect(columnWidth: number) {
         return new MockQmlRect(
-            (screen.width - columnWidth) / 2,
+            tilingArea.left + (tilingArea.width - columnWidth) / 2,
             tilingArea.top,
             columnWidth,
             tilingArea.height,
diff --git a/src/tests/utils/global.ts b/src/tests/utils/global.ts
index adde8de..2daa880 100644
--- a/src/tests/utils/global.ts
+++ b/src/tests/utils/global.ts
@@ -35,7 +35,7 @@ function init(config: Config) {
 
 function getGridBounds(clientLeft: KwinClient, clientRight: KwinClient) {
     const columnsWidth = clientRight.frameGeometry.right - clientLeft.frameGeometry.left;
-    const left = Math.floor((screen.width - columnsWidth) / 2);
+    const left = tilingArea.left + Math.floor((tilingArea.width - columnsWidth) / 2);
     const right = left + columnsWidth;
     return { left, right };
 }