diff --git a/Sources/AsyncSequenceValidation/Clock.swift b/Sources/AsyncSequenceValidation/Clock.swift
index 492e0bbc..c85c92c1 100644
--- a/Sources/AsyncSequenceValidation/Clock.swift
+++ b/Sources/AsyncSequenceValidation/Clock.swift
@@ -22,6 +22,7 @@ extension AsyncSequenceValidationDiagram {
   }
 }
 
+@available(AsyncAlgorithms 1.0, *)
 public protocol TestClock: Sendable {
   associatedtype Instant: TestInstant
 
@@ -30,6 +31,7 @@ public protocol TestClock: Sendable {
   func sleep(until deadline: Self.Instant, tolerance: Self.Instant.Duration?) async throws
 }
 
+@available(AsyncAlgorithms 1.0, *)
 public protocol TestInstant: Equatable {
   associatedtype Duration
 }
diff --git a/Tests/AsyncAlgorithmsTests/MultiProducerSingleConsumerChannel/MultiProducerSingleConsumerAsyncChannelTests.swift b/Tests/AsyncAlgorithmsTests/MultiProducerSingleConsumerChannel/MultiProducerSingleConsumerAsyncChannelTests.swift
index ead13dee..d57dfbf6 100644
--- a/Tests/AsyncAlgorithmsTests/MultiProducerSingleConsumerChannel/MultiProducerSingleConsumerAsyncChannelTests.swift
+++ b/Tests/AsyncAlgorithmsTests/MultiProducerSingleConsumerChannel/MultiProducerSingleConsumerAsyncChannelTests.swift
@@ -971,7 +971,7 @@ final class MultiProducerSingleConsumerAsyncChannelTests: XCTestCase {
         backpressureStrategy: .watermark(low: 2, high: 4)
       )
       let channel = channelAndSource.takeChannel()
-      var source: MultiProducerSingleConsumerAsyncChannel.Source! = consume channelAndSource.source
+      var source: MultiProducerSingleConsumerAsyncChannel<Int, Never>.Source! = consume channelAndSource.source
 
       group.addTask {
         var source = source.take()!