1 files changed, 13 insertions, 14 deletions
diff --git a/jstests/core/profile_update.js b/jstests/core/profile_update.js
index 8a3e680da60..f9c9d91738c 100644
--- a/jstests/core/profile_update.js
+++ b/jstests/core/profile_update.js
@@ -98,9 +98,12 @@ assert.commandWorked(coll.update({_id: "new value", a: 4}, {$inc: {b: 1}}, {upse
 profileObj = getLatestProfilerEntry(testDB);
 
 const collectionIsClustered = ClusteredCollectionUtil.areAllCollectionsClustered(db.getMongo());
-const expectedPlan = collectionIsClustered ? "CLUSTERED_IXSCAN" : "IXSCAN { _id: 1 }";
-const expectedKeysExamined = 0;
-const expectedDocsExamined = collectionIsClustered ? 1 : 0;
+// A clustered collection has no actual index on _id. While a bounded collection scan is in
+// principle an efficient option, the query planner only defaults to collection scan if no suitable
+// index is available.
+const expectedPlan = collectionIsClustered ? "IXSCAN { a: 1 }" : "IXSCAN { _id: 1 }";
+const expectedKeysExamined = collectionIsClustered ? 1 : 0;
+const expectedDocsExamined = expectedKeysExamined;
 const expectedKeysInserted = collectionIsClustered ? 1 : 2;
 
 assert.eq(profileObj.command,
@@ -144,17 +147,13 @@ for (var i = 0; i < indices.length; i++) {
     const profileObj = profiles[i];
     const index = indices[i];
 
-    let expectedPlan = "IXSCAN { _id: 1 }";
-    let expectedKeysExamined = 0;
-    let expectedDocsExamined = 0;
-    let expectedKeysInserted = 2;
-
-    if (collectionIsClustered) {
-        expectedPlan = "CLUSTERED_IXSCAN";
-        expectedKeysExamined = 0;
-        expectedDocsExamined = (i + 1 == indices.length) ? 1 : 2;
-        expectedKeysInserted = 1;
-    }
+    // A clustered collection has no actual index on _id. While a bounded collection scan is in
+    // principle an efficient option, the query planner only defaults to collection scan if no
+    // suitable index is available.
+    const expectedPlan = collectionIsClustered ? "IXSCAN { a: 1 }" : "IXSCAN { _id: 1 }";
+    const expectedKeysExamined = collectionIsClustered ? 1 : 0;
+    const expectedDocsExamined = expectedKeysExamined;
+    const expectedKeysInserted = collectionIsClustered ? 1 : 2;
 
     assert.eq(
         profileObj.command,