diff --git a/third_party/WebKit/LayoutTests/TestExpectations b/third_party/WebKit/LayoutTests/TestExpectations
index 34dea758d32840..eca63934cbe676 100644
--- a/third_party/WebKit/LayoutTests/TestExpectations
+++ b/third_party/WebKit/LayoutTests/TestExpectations
@@ -4677,3 +4677,8 @@ crbug.com/866850 [ Linux Mac ] virtual/gpu/fast/canvas/canvas-blending-pattern-o
 crbug.com/866850 [ Linux Mac ] virtual/gpu/fast/canvas/canvas-blending-pattern-over-image.html [ Pass Timeout ]
 crbug.com/866850 [ Linux Mac ] virtual/gpu/fast/canvas/color-space/canvas-createImageBitmap-p3.html [ Pass Timeout ]
 crbug.com/866850 [ Linux Mac ] virtual/gpu/fast/canvas/color-space/canvas-createImageBitmap-rec2020.html [ Pass Timeout ]
+
+# Sheriff 2018-07-24
+crbug.com/866965 [ Linux ] virtual/outofblink-cors-ns/external/wpt/service-workers/service-worker/interfaces-sw.https.html [ Timeout ]
+crbug.com/866965 [ Linux ] virtual/outofblink-cors/external/wpt/service-workers/service-worker/interfaces-sw.https.html [ Timeout ]
+crbug.com/866965 [ Linux ] virtual/service-worker-servicification/external/wpt/service-workers/service-worker/interfaces-sw.https.html [ Timeout ]