diff --git a/Tests/SwiftDriverTests/CachingBuildTests.swift b/Tests/SwiftDriverTests/CachingBuildTests.swift
index b9d61655e..a3603702d 100644
--- a/Tests/SwiftDriverTests/CachingBuildTests.swift
+++ b/Tests/SwiftDriverTests/CachingBuildTests.swift
@@ -873,7 +873,6 @@ final class CachingBuildTests: XCTestCase {
 
       XCTAssertEqual(testDiagnostics.count, 1)
       XCTAssertEqual(testDiagnostics[0].severity, .error)
-      XCTAssertEqual(testDiagnostics[0].message, "CAS error encountered: conflicting CAS options used in scanning service")
     }
   }