diff --git a/Tests/CombineSchedulersTests/ImmediateSchedulerTests.swift b/Tests/CombineSchedulersTests/ImmediateSchedulerTests.swift
index c5374be..2cb8020 100644
--- a/Tests/CombineSchedulersTests/ImmediateSchedulerTests.swift
+++ b/Tests/CombineSchedulersTests/ImmediateSchedulerTests.swift
@@ -1,3 +1,4 @@
+#if canImport(Combine)
 import Combine
 import CombineSchedulers
 import XCTest
@@ -17,3 +18,4 @@ final class ImmediateSchedulerTests: XCTestCase {
     XCTAssertEqual(worked, 3)
   }
 }
+#endif
diff --git a/Tests/CombineSchedulersTests/TestSchedulerTests.swift b/Tests/CombineSchedulersTests/TestSchedulerTests.swift
index 3ee0511..03a3dc3 100644
--- a/Tests/CombineSchedulersTests/TestSchedulerTests.swift
+++ b/Tests/CombineSchedulersTests/TestSchedulerTests.swift
@@ -1,3 +1,4 @@
+#if canImport(Combine)
 import Combine
 import CombineSchedulers
 import XCTest
@@ -250,3 +251,4 @@ final class CombineSchedulerTests: XCTestCase {
     XCTAssertEqual(testScheduler.now, start.advanced(by: .seconds(2)))
   }
 }
+#endif
\ No newline at end of file
diff --git a/Tests/CombineSchedulersTests/TimerTests.swift b/Tests/CombineSchedulersTests/TimerTests.swift
index ae0756c..2fbf8e7 100644
--- a/Tests/CombineSchedulersTests/TimerTests.swift
+++ b/Tests/CombineSchedulersTests/TimerTests.swift
@@ -1,3 +1,4 @@
+#if canImport(Combine)
 import Combine
 import CombineSchedulers
 import XCTest
@@ -142,3 +143,4 @@ final class TimerTests: XCTestCase {
     XCTAssertEqual(count, 3)
   }
 }
+#endif
\ No newline at end of file
diff --git a/Tests/CombineSchedulersTests/UISchedulerTests.swift b/Tests/CombineSchedulersTests/UISchedulerTests.swift
index b55bbfb..bd4770a 100644
--- a/Tests/CombineSchedulersTests/UISchedulerTests.swift
+++ b/Tests/CombineSchedulersTests/UISchedulerTests.swift
@@ -1,3 +1,4 @@
+#if canImport(Combine)
 import Combine
 import CombineSchedulers
 import XCTest
@@ -29,3 +30,4 @@ final class UISchedulerTests: XCTestCase {
     XCTAssertTrue(worked)
   }
 }
+#endif
\ No newline at end of file
diff --git a/Tests/CombineSchedulersTests/UnimplementedSchedulerTests.swift b/Tests/CombineSchedulersTests/UnimplementedSchedulerTests.swift
index a0eee54..d662f8d 100644
--- a/Tests/CombineSchedulersTests/UnimplementedSchedulerTests.swift
+++ b/Tests/CombineSchedulersTests/UnimplementedSchedulerTests.swift
@@ -1,4 +1,5 @@
 #if compiler(>=5.4)
+#if canImport(Combine)
   import Combine
   import CombineSchedulers
   import XCTest
@@ -32,4 +33,5 @@
       }
     }
   }
+#endif // canImport(Combine)
 #endif