diff --git a/Sources/AsyncSequenceValidation/Clock.swift b/Sources/AsyncSequenceValidation/Clock.swift
index 6f33d15a..e76f5aa9 100644
--- a/Sources/AsyncSequenceValidation/Clock.swift
+++ b/Sources/AsyncSequenceValidation/Clock.swift
@@ -132,3 +132,7 @@ extension AsyncSequenceValidationDiagram.Clock: TestClock { }
 
 @available(macOS 13.0, iOS 16.0, watchOS 9.0, tvOS 16.0, *)
 extension AsyncSequenceValidationDiagram.Clock: Clock { }
+
+// placeholders to avoid warnings
+extension AsyncSequenceValidationDiagram.Clock.Instant: Hashable { }
+extension AsyncSequenceValidationDiagram.Clock.Instant: Comparable { }
diff --git a/Sources/AsyncSequenceValidation/Test.swift b/Sources/AsyncSequenceValidation/Test.swift
index 35177cf2..0275cc11 100644
--- a/Sources/AsyncSequenceValidation/Test.swift
+++ b/Sources/AsyncSequenceValidation/Test.swift
@@ -68,6 +68,12 @@ extension AsyncSequenceValidationDiagram {
   
   struct Context {
     final class ClockExecutor: SerialExecutor {
+      @available(macOS 14.0, iOS 17.0, watchOS 10.0, tvOS 17.0, *)
+      func enqueue(_ job: __owned ExecutorJob) {
+        job.runSynchronously(on: asUnownedSerialExecutor())
+      }
+      
+      @available(*, deprecated) // known deprecation warning
       func enqueue(_ job: UnownedJob) {
         job._runSynchronously(on: asUnownedSerialExecutor())
       }
diff --git a/Tests/AsyncAlgorithmsTests/TestAdjacentPairs.swift b/Tests/AsyncAlgorithmsTests/TestAdjacentPairs.swift
index 843624f6..4fea0ef5 100644
--- a/Tests/AsyncAlgorithmsTests/TestAdjacentPairs.swift
+++ b/Tests/AsyncAlgorithmsTests/TestAdjacentPairs.swift
@@ -88,10 +88,11 @@ final class TestAdjacentPairs: XCTestCase {
     }
     
     // ensure the other task actually starts
-    wait(for: [iterated], timeout: 1.0)
+    
+    await fulfillment(of: [iterated], timeout: 1.0)
     // cancellation should ensure the loop finishes
     // without regards to the remaining underlying sequence
     task.cancel()
-    wait(for: [finished], timeout: 1.0)
+    await fulfillment(of: [finished], timeout: 1.0)
   }
 }
diff --git a/Tests/AsyncAlgorithmsTests/TestBuffer.swift b/Tests/AsyncAlgorithmsTests/TestBuffer.swift
index f8ef8a3c..7bb45f89 100644
--- a/Tests/AsyncAlgorithmsTests/TestBuffer.swift
+++ b/Tests/AsyncAlgorithmsTests/TestBuffer.swift
@@ -190,13 +190,13 @@ final class TestBuffer: XCTestCase {
       finished.fulfill()
     }
     // ensure the task actually starts
-    wait(for: [iterated], timeout: 1.0)
+    await fulfillment(of: [iterated], timeout: 1.0)
 
     // When
     task.cancel()
 
     // Then
-    wait(for: [finished], timeout: 1.0)
+    await fulfillment(of: [finished], timeout: 1.0)
   }
 
   func test_given_a_base_sequence_when_buffering_with_bounded_then_the_buffer_is_filled_in_and_suspends() async {
@@ -310,13 +310,13 @@ final class TestBuffer: XCTestCase {
       finished.fulfill()
     }
     // ensure the other task actually starts
-    wait(for: [iterated], timeout: 1.0)
+    await fulfillment(of: [iterated], timeout: 1.0)
 
     // When
     task.cancel()
 
     // Then
-    wait(for: [finished], timeout: 1.0)
+    await fulfillment(of: [finished], timeout: 1.0)
   }
 
   func test_given_a_base_sequence_when_bounded_with_limit_0_then_the_policy_is_transparent() async {
diff --git a/Tests/AsyncAlgorithmsTests/TestBufferedByteIterator.swift b/Tests/AsyncAlgorithmsTests/TestBufferedByteIterator.swift
index ee6c5d12..2c8841d8 100644
--- a/Tests/AsyncAlgorithmsTests/TestBufferedByteIterator.swift
+++ b/Tests/AsyncAlgorithmsTests/TestBufferedByteIterator.swift
@@ -199,10 +199,10 @@ final class TestBufferedByteIterator: XCTestCase {
         }
       }
     }
-    wait(for: [iterated], timeout: 1.0)
+    await fulfillment(of: [iterated], timeout: 1.0)
     // cancellation should ensure the loop finishes
     // without regards to the remaining underlying sequence
     task.cancel()
-    wait(for: [finished], timeout: 1.0)
+    await fulfillment(of: [finished], timeout: 1.0)
   }
 }
diff --git a/Tests/AsyncAlgorithmsTests/TestChain.swift b/Tests/AsyncAlgorithmsTests/TestChain.swift
index b3be90a3..6bb2cb55 100644
--- a/Tests/AsyncAlgorithmsTests/TestChain.swift
+++ b/Tests/AsyncAlgorithmsTests/TestChain.swift
@@ -87,13 +87,13 @@ final class TestChain2: XCTestCase {
     }
 
     // ensure the other task actually starts
-    wait(for: [iterated], timeout: 1.0)
+    await fulfillment(of: [iterated], timeout: 1.0)
 
     // cancellation should ensure the loop finishes
     // without regards to the remaining underlying sequence
     task.cancel()
 
-    wait(for: [finished], timeout: 1.0)
+    await fulfillment(of: [finished], timeout: 1.0)
   }
 }
 
@@ -192,12 +192,12 @@ final class TestChain3: XCTestCase {
     }
 
     // ensure the other task actually starts
-    wait(for: [iterated], timeout: 1.0)
+    await fulfillment(of: [iterated], timeout: 1.0)
 
     // cancellation should ensure the loop finishes
     // without regards to the remaining underlying sequence
     task.cancel()
 
-    wait(for: [finished], timeout: 1.0)
+    await fulfillment(of: [finished], timeout: 1.0)
   }
 }
diff --git a/Tests/AsyncAlgorithmsTests/TestChannel.swift b/Tests/AsyncAlgorithmsTests/TestChannel.swift
index b181bddd..b5d28cd9 100644
--- a/Tests/AsyncAlgorithmsTests/TestChannel.swift
+++ b/Tests/AsyncAlgorithmsTests/TestChannel.swift
@@ -133,7 +133,7 @@ final class TestChannel: XCTestCase {
     task1.cancel()
 
     // Then: the first sending operation is resumed
-    wait(for: [send1IsResumed], timeout: 1.0)
+    await fulfillment(of: [send1IsResumed], timeout: 1.0)
 
     // When: collecting elements
     var iterator = sut.makeAsyncIterator()
diff --git a/Tests/AsyncAlgorithmsTests/TestCombineLatest.swift b/Tests/AsyncAlgorithmsTests/TestCombineLatest.swift
index f33258c9..cb0f7324 100644
--- a/Tests/AsyncAlgorithmsTests/TestCombineLatest.swift
+++ b/Tests/AsyncAlgorithmsTests/TestCombineLatest.swift
@@ -84,7 +84,7 @@ final class TestCombineLatest2: XCTestCase {
     value = await validator.validate()
     XCTAssertEqual(value, [(1, "a"), (2, "a"), (2, "b"), (3, "b"), (3, "c")])
     
-    wait(for: [finished], timeout: 1.0)
+    await fulfillment(of: [finished], timeout: 1.0)
     value = validator.current
     XCTAssertEqual(value, [(1, "a"), (2, "a"), (2, "b"), (3, "b"), (3, "c")])
   }
@@ -126,7 +126,7 @@ final class TestCombineLatest2: XCTestCase {
     value = await validator.validate()
     XCTAssertEqual(value, [(1, "a"), (1, "b"), (2, "b"), (2, "c"), (3, "c")])
     
-    wait(for: [finished], timeout: 1.0)
+    await fulfillment(of: [finished], timeout: 1.0)
     value = validator.current
     XCTAssertEqual(value, [(1, "a"), (1, "b"), (2, "b"), (2, "c"), (3, "c")])
   }
@@ -168,7 +168,7 @@ final class TestCombineLatest2: XCTestCase {
     value = await validator.validate()
     XCTAssertEqual(value, [(1, "a"), (2, "a"), (3, "a"), (3, "b"), (3, "c")])
     
-    wait(for: [finished], timeout: 1.0)
+    await fulfillment(of: [finished], timeout: 1.0)
     value = validator.current
     XCTAssertEqual(value, [(1, "a"), (2, "a"), (3, "a"), (3, "b"), (3, "c")])
   }
@@ -210,7 +210,7 @@ final class TestCombineLatest2: XCTestCase {
     value = await validator.validate()
     XCTAssertEqual(value, [(1, "a"), (1, "b"), (1, "c"), (2, "c"), (3, "c")])
     
-    wait(for: [finished], timeout: 1.0)
+    await fulfillment(of: [finished], timeout: 1.0)
     value = validator.current
     XCTAssertEqual(value, [(1, "a"), (1, "b"), (1, "c"), (2, "c"), (3, "c")])
   }
@@ -250,7 +250,7 @@ final class TestCombineLatest2: XCTestCase {
     
     XCTAssertEqual(validator.failure as? Failure, Failure())
     
-    wait(for: [finished], timeout: 1.0)
+    await fulfillment(of: [finished], timeout: 1.0)
     value = validator.current
     XCTAssertEqual(value, [(1, "a"), (1, "b")])
   }
@@ -290,7 +290,7 @@ final class TestCombineLatest2: XCTestCase {
     
     XCTAssertEqual(validator.failure as? Failure, Failure())
     
-    wait(for: [finished], timeout: 1.0)
+    await fulfillment(of: [finished], timeout: 1.0)
     value = validator.current
     XCTAssertEqual(value, [(1, "a"), (2, "a")])
   }
@@ -312,11 +312,11 @@ final class TestCombineLatest2: XCTestCase {
       finished.fulfill()
     }
     // ensure the other task actually starts
-    wait(for: [iterated], timeout: 1.0)
+    await fulfillment(of: [iterated], timeout: 1.0)
     // cancellation should ensure the loop finishes
     // without regards to the remaining underlying sequence
     task.cancel()
-    wait(for: [finished], timeout: 1.0)
+    await fulfillment(of: [finished], timeout: 1.0)
   }
 
     func test_combineLatest_when_cancelled() async {
@@ -389,7 +389,7 @@ final class TestCombineLatest3: XCTestCase {
     value = await validator.validate()
     XCTAssertEqual(value, [(1, "a", 4), (2, "a", 4), (2, "b", 4), (2, "b", 5), (3, "b", 5), (3, "c", 5), (3, "c", 6)])
 
-    wait(for: [finished], timeout: 1.0)
+    await fulfillment(of: [finished], timeout: 1.0)
     value = validator.current
     XCTAssertEqual(value, [(1, "a", 4), (2, "a", 4), (2, "b", 4), (2, "b", 5), (3, "b", 5), (3, "c", 5), (3, "c", 6)])
   }
diff --git a/Tests/AsyncAlgorithmsTests/TestCompacted.swift b/Tests/AsyncAlgorithmsTests/TestCompacted.swift
index b82fe31e..3e2e5198 100644
--- a/Tests/AsyncAlgorithmsTests/TestCompacted.swift
+++ b/Tests/AsyncAlgorithmsTests/TestCompacted.swift
@@ -83,10 +83,10 @@ final class TestCompacted: XCTestCase {
       finished.fulfill()
     }
     // ensure the other task actually starts
-    wait(for: [iterated], timeout: 1.0)
+    await fulfillment(of: [iterated], timeout: 1.0)
     // cancellation should ensure the loop finishes
     // without regards to the remaining underlying sequence
     task.cancel()
-    wait(for: [finished], timeout: 1.0)
+    await fulfillment(of: [finished], timeout: 1.0)
   }
 }
diff --git a/Tests/AsyncAlgorithmsTests/TestJoin.swift b/Tests/AsyncAlgorithmsTests/TestJoin.swift
index 91de1ef9..c60b71da 100644
--- a/Tests/AsyncAlgorithmsTests/TestJoin.swift
+++ b/Tests/AsyncAlgorithmsTests/TestJoin.swift
@@ -122,11 +122,11 @@ final class TestJoinedBySeparator: XCTestCase {
       finished.fulfill()
     }
     // ensure the other task actually starts
-    wait(for: [iterated], timeout: 1.0)
+    await fulfillment(of: [iterated], timeout: 1.0)
     // cancellation should ensure the loop finishes
     // without regards to the remaining underlying sequence
     task.cancel()
-    wait(for: [finished], timeout: 1.0)
+    await fulfillment(of: [finished], timeout: 1.0)
   }
 }
 
@@ -206,10 +206,10 @@ final class TestJoined: XCTestCase {
       finished.fulfill()
     }
     // ensure the other task actually starts
-    wait(for: [iterated], timeout: 1.0)
+    await fulfillment(of: [iterated], timeout: 1.0)
     // cancellation should ensure the loop finishes
     // without regards to the remaining underlying sequence
     task.cancel()
-    wait(for: [finished], timeout: 1.0)
+    await fulfillment(of: [finished], timeout: 1.0)
   }
 }
diff --git a/Tests/AsyncAlgorithmsTests/TestLazy.swift b/Tests/AsyncAlgorithmsTests/TestLazy.swift
index 1ef69d29..3ff8c5c1 100644
--- a/Tests/AsyncAlgorithmsTests/TestLazy.swift
+++ b/Tests/AsyncAlgorithmsTests/TestLazy.swift
@@ -121,12 +121,12 @@ final class TestLazy: XCTestCase {
     }
 
     // ensure the other task actually starts
-    wait(for: [iterated], timeout: 1.0)
+    await fulfillment(of: [iterated], timeout: 1.0)
 
     // cancellation should ensure the loop finishes
     // without regards to the remaining underlying sequence
     task.cancel()
 
-    wait(for: [finished], timeout: 1.0)
+    await fulfillment(of: [finished], timeout: 1.0)
   }
 }
diff --git a/Tests/AsyncAlgorithmsTests/TestManualClock.swift b/Tests/AsyncAlgorithmsTests/TestManualClock.swift
index 045ba2de..15cc97bb 100644
--- a/Tests/AsyncAlgorithmsTests/TestManualClock.swift
+++ b/Tests/AsyncAlgorithmsTests/TestManualClock.swift
@@ -29,7 +29,7 @@ final class TestManualClock: XCTestCase {
     clock.advance()
     XCTAssertFalse(state.withCriticalRegion { $0 })
     clock.advance()
-    wait(for: [afterSleep], timeout: 1.0)
+    await fulfillment(of: [afterSleep], timeout: 1.0)
     XCTAssertTrue(state.withCriticalRegion { $0 })
   }
   
@@ -51,7 +51,7 @@ final class TestManualClock: XCTestCase {
     XCTAssertFalse(state.withCriticalRegion { $0 })
     clock.advance()
     task.cancel()
-    wait(for: [afterSleep], timeout: 1.0)
+    await fulfillment(of: [afterSleep], timeout: 1.0)
     XCTAssertTrue(state.withCriticalRegion { $0 })
     XCTAssertTrue(failure.withCriticalRegion { $0 is CancellationError })
   }
@@ -73,7 +73,7 @@ final class TestManualClock: XCTestCase {
     }
     XCTAssertFalse(state.withCriticalRegion { $0 })
     task.cancel()
-    wait(for: [afterSleep], timeout: 1.0)
+    await fulfillment(of: [afterSleep], timeout: 1.0)
     XCTAssertTrue(state.withCriticalRegion { $0 })
     XCTAssertTrue(failure.withCriticalRegion { $0 is CancellationError })
   }
diff --git a/Tests/AsyncAlgorithmsTests/TestMerge.swift b/Tests/AsyncAlgorithmsTests/TestMerge.swift
index 0bcb3479..c8d5e1ce 100644
--- a/Tests/AsyncAlgorithmsTests/TestMerge.swift
+++ b/Tests/AsyncAlgorithmsTests/TestMerge.swift
@@ -185,11 +185,11 @@ final class TestMerge2: XCTestCase {
       finished.fulfill()
     }
     // ensure the other task actually starts
-    wait(for: [iterated], timeout: 1.0)
+    await fulfillment(of: [iterated], timeout: 1.0)
     // cancellation should ensure the loop finishes
     // without regards to the remaining underlying sequence
     task.cancel()
-    wait(for: [finished], timeout: 1.0)
+    await fulfillment(of: [finished], timeout: 1.0)
   }
 
     func test_merge_when_cancelled() async {
@@ -509,11 +509,11 @@ final class TestMerge3: XCTestCase {
       finished.fulfill()
     }
     // ensure the other task actually starts
-    wait(for: [iterated], timeout: 1.0)
+    await fulfillment(of: [iterated], timeout: 1.0)
     // cancellation should ensure the loop finishes
     // without regards to the remaining underlying sequence
     task.cancel()
-    wait(for: [finished], timeout: 1.0)
+    await fulfillment(of: [finished], timeout: 1.0)
   }
 
     // MARK: - IteratorInitialized
diff --git a/Tests/AsyncAlgorithmsTests/TestReductions.swift b/Tests/AsyncAlgorithmsTests/TestReductions.swift
index ad9cf5ac..24e7e4e4 100644
--- a/Tests/AsyncAlgorithmsTests/TestReductions.swift
+++ b/Tests/AsyncAlgorithmsTests/TestReductions.swift
@@ -217,10 +217,10 @@ final class TestReductions: XCTestCase {
       finished.fulfill()
     }
     // ensure the other task actually starts
-    wait(for: [iterated], timeout: 1.0)
+    await fulfillment(of: [iterated], timeout: 1.0)
     // cancellation should ensure the loop finishes
     // without regards to the remaining underlying sequence
     task.cancel()
-    wait(for: [finished], timeout: 1.0)
+    await fulfillment(of: [finished], timeout: 1.0)
   }
 }
diff --git a/Tests/AsyncAlgorithmsTests/TestRemoveDuplicates.swift b/Tests/AsyncAlgorithmsTests/TestRemoveDuplicates.swift
index 01ddf3ff..932585b0 100644
--- a/Tests/AsyncAlgorithmsTests/TestRemoveDuplicates.swift
+++ b/Tests/AsyncAlgorithmsTests/TestRemoveDuplicates.swift
@@ -95,10 +95,10 @@ final class TestRemoveDuplicates: XCTestCase {
       finished.fulfill()
     }
     // ensure the other task actually starts
-    wait(for: [iterated], timeout: 1.0)
+    await fulfillment(of: [iterated], timeout: 1.0)
     // cancellation should ensure the loop finishes
     // without regards to the remaining underlying sequence
     task.cancel()
-    wait(for: [finished], timeout: 1.0)
+    await fulfillment(of: [finished], timeout: 1.0)
   }
 }
diff --git a/Tests/AsyncAlgorithmsTests/TestThrowingChannel.swift b/Tests/AsyncAlgorithmsTests/TestThrowingChannel.swift
index 7dd60f18..6110c884 100644
--- a/Tests/AsyncAlgorithmsTests/TestThrowingChannel.swift
+++ b/Tests/AsyncAlgorithmsTests/TestThrowingChannel.swift
@@ -270,7 +270,7 @@ final class TestThrowingChannel: XCTestCase {
     task1.cancel()
 
     // Then: the first sending operation is resumed
-    wait(for: [send1IsResumed], timeout: 1.0)
+    await fulfillment(of: [send1IsResumed], timeout: 1.0)
 
     // When: collecting elements
     var iterator = sut.makeAsyncIterator()
diff --git a/Tests/AsyncAlgorithmsTests/TestValidator.swift b/Tests/AsyncAlgorithmsTests/TestValidator.swift
index 9c5ef9c2..67d2f37e 100644
--- a/Tests/AsyncAlgorithmsTests/TestValidator.swift
+++ b/Tests/AsyncAlgorithmsTests/TestValidator.swift
@@ -24,7 +24,7 @@ final class TestValidator: XCTestCase {
     }
     XCTAssertFalse(state.withCriticalRegion { $0 })
     gate.open()
-    wait(for: [entered], timeout: 1.0)
+    await fulfillment(of: [entered], timeout: 1.0)
     XCTAssertTrue(state.withCriticalRegion { $0 })
   }
   
@@ -52,18 +52,18 @@ final class TestValidator: XCTestCase {
       }
       finished.fulfill()
     }
-    wait(for: [started], timeout: 1.0)
+    await fulfillment(of: [started], timeout: 1.0)
     XCTAssertEqual(state.withCriticalRegion { $0 }, [])
     gated.advance()
-    wait(for: [expectations[0]], timeout: 1.0)
+    await fulfillment(of: [expectations[0]], timeout: 1.0)
     XCTAssertEqual(state.withCriticalRegion { $0 }, [1])
     gated.advance()
-    wait(for: [expectations[1]], timeout: 1.0)
+    await fulfillment(of: [expectations[1]], timeout: 1.0)
     XCTAssertEqual(state.withCriticalRegion { $0 }, [1, 2])
     gated.advance()
-    wait(for: [expectations[2]], timeout: 1.0)
+    await fulfillment(of: [expectations[2]], timeout: 1.0)
     XCTAssertEqual(state.withCriticalRegion { $0 }, [1, 2, 3])
-    wait(for: [finished], timeout: 1.0)
+    await fulfillment(of: [finished], timeout: 1.0)
   }
   
   func test_gatedSequence_throwing() async {
@@ -93,14 +93,14 @@ final class TestValidator: XCTestCase {
       }
       finished.fulfill()
     }
-    wait(for: [started], timeout: 1.0)
+    await fulfillment(of: [started], timeout: 1.0)
     XCTAssertEqual(state.withCriticalRegion { $0 }, [])
     gated.advance()
-    wait(for: [expectations[0]], timeout: 1.0)
+    await fulfillment(of: [expectations[0]], timeout: 1.0)
     XCTAssertEqual(state.withCriticalRegion { $0 }, [1])
     gated.advance()
     XCTAssertEqual(state.withCriticalRegion { $0 }, [1])
-    wait(for: [finished], timeout: 1.0)
+    await fulfillment(of: [finished], timeout: 1.0)
     XCTAssertEqual(state.withCriticalRegion { $0 }, [1])
     XCTAssertEqual(failure.withCriticalRegion { $0 as? Failure }, Failure())
   }
@@ -131,7 +131,7 @@ final class TestValidator: XCTestCase {
     XCTAssertEqual(value, [2, 3, 4])
     a.advance()
     
-    wait(for: [finished], timeout: 1.0)
+    await fulfillment(of: [finished], timeout: 1.0)
     value = validator.current
     XCTAssertEqual(value, [2, 3, 4])
   }
diff --git a/Tests/AsyncAlgorithmsTests/TestZip.swift b/Tests/AsyncAlgorithmsTests/TestZip.swift
index 25bc9ec7..4c2fb229 100644
--- a/Tests/AsyncAlgorithmsTests/TestZip.swift
+++ b/Tests/AsyncAlgorithmsTests/TestZip.swift
@@ -152,11 +152,11 @@ final class TestZip2: XCTestCase {
       finished.fulfill()
     }
     // ensure the other task actually starts
-    wait(for: [iterated], timeout: 1.0)
+    await fulfillment(of: [iterated], timeout: 1.0)
     // cancellation should ensure the loop finishes
     // without regards to the remaining underlying sequence
     task.cancel()
-    wait(for: [finished], timeout: 1.0)
+    await fulfillment(of: [finished], timeout: 1.0)
   }
 
   func test_zip_when_cancelled() async {
@@ -370,10 +370,10 @@ final class TestZip3: XCTestCase {
       finished.fulfill()
     }
     // ensure the other task actually starts
-    wait(for: [iterated], timeout: 1.0)
+    await fulfillment(of: [iterated], timeout: 1.0)
     // cancellation should ensure the loop finishes
     // without regards to the remaining underlying sequence
     task.cancel()
-    wait(for: [finished], timeout: 1.0)
+    await fulfillment(of: [finished], timeout: 1.0)
   }
 }