diff --git a/Docker/docker-compose.yaml b/Docker/docker-compose.yaml
index 88af3c9..18e3832 100644
--- a/Docker/docker-compose.yaml
+++ b/Docker/docker-compose.yaml
@@ -25,7 +25,7 @@ services:
 
   test:
     <<: *common
-    command: /bin/bash -xcl "./Utilities/test.sh $${WARN_AS_ERROR_ARG-} $${SANITIZER_ARG-} $${IMPORT_CHECK_ARG-}"
+    command: /bin/bash -xcl "swift test $${WARN_AS_ERROR_ARG-} $${SANITIZER_ARG-} $${IMPORT_CHECK_ARG-}"
 
   # util
 
diff --git a/Sources/Helpers/Vendor/QueryEngine/CacheKey.swift b/Sources/Helpers/Vendor/QueryEngine/CacheKey.swift
index c09b0de..b3c2c05 100644
--- a/Sources/Helpers/Vendor/QueryEngine/CacheKey.swift
+++ b/Sources/Helpers/Vendor/QueryEngine/CacheKey.swift
@@ -167,7 +167,11 @@ extension FilePath.Component: LeafCacheKey {
 
 extension URL: LeafCacheKey {
   func hash(with hashFunction: inout some HashFunction) {
-    String(reflecting: Self.self).hash(with: &hashFunction)
+    // Until Swift 6.0, the fully-qualified name of the URL type was `Foundation.URL`.
+    // After the adoption of FoundationEssentials, the name changed to `FoundationEssentials.URL`.
+    // This difference causes the hashes to change, so for backwards compatibility we pin the
+    // type name to `Foundation.URL`.
+    "Foundation.URL".hash(with: &hashFunction)
     self.description.hash(with: &hashFunction)
   }
 }
diff --git a/Tests/SwiftSDKGeneratorTests/EndToEndTests.swift b/Tests/SwiftSDKGeneratorTests/EndToEndTests.swift
index 513ac98..c839349 100644
--- a/Tests/SwiftSDKGeneratorTests/EndToEndTests.swift
+++ b/Tests/SwiftSDKGeneratorTests/EndToEndTests.swift
@@ -39,6 +39,8 @@ final class EndToEndTests: XCTestCase {
 
   #if !os(macOS)
   func testPackageInitExecutable() async throws {
+    throw XCTSkip("EndToEnd tests currently deadlock under `swift test`: https://github.com/swiftlang/swift-sdk-generator/issues/143")
+
     let fm = FileManager.default
 
     var packageDirectory = FilePath(#filePath)
@@ -102,6 +104,8 @@ final class EndToEndTests: XCTestCase {
   }
 
   func testRepeatedSDKBuilds() async throws {
+    throw XCTSkip("EndToEnd tests currently deadlock under `swift test`: https://github.com/swiftlang/swift-sdk-generator/issues/143")
+
     let fm = FileManager.default
 
     var packageDirectory = FilePath(#filePath)
diff --git a/Utilities/test.sh b/Utilities/test.sh
deleted file mode 100755
index 0c34e4d..0000000
--- a/Utilities/test.sh
+++ /dev/null
@@ -1,20 +0,0 @@
-#!/bin/bash
-##===----------------------------------------------------------------------===##
-##
-## This source file is part of the Swift open source project
-##
-## Copyright (c) YEARS Apple Inc. and the Swift project authors
-## Licensed under Apache License v2.0 with Runtime Library Exception
-##
-## See https://swift.org/LICENSE.txt for license information
-## See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
-##
-##===----------------------------------------------------------------------===##
-
-set -ex
-
-if [ "$(uname)" = Darwin ]; then
-    swift test $@
-else
-    swift build --build-tests $@
-fi