diff --git a/http-scala-fx/src/test/scala/fx/HttpServerFixtures.scala b/http-scala-fx/src/test/scala/fx/HttpServerFixtures.scala
index e173ac71..a1e9be96 100644
--- a/http-scala-fx/src/test/scala/fx/HttpServerFixtures.scala
+++ b/http-scala-fx/src/test/scala/fx/HttpServerFixtures.scala
@@ -116,10 +116,10 @@ trait HttpServerFixtures:
       setup = _ => {
         for {
           server <- Resource(
-            HttpServer.create(InetSocketAddress(0), 0),
+            () => HttpServer.create(InetSocketAddress(0), 0),
             (server, _) => server.stop(0))
           serverExecutor <- Resource(
-            Executors.newVirtualThreadPerTaskExecutor,
+            () => Executors.newVirtualThreadPerTaskExecutor,
             (executor, _) => executor.shutdown())
           _ = server.setExecutor(serverExecutor)
           httpContext = server.createContext("/root", handler)
diff --git a/scala-fx/src/main/scala/fx/Fiber.scala b/scala-fx/src/main/scala/fx/Fiber.scala
index 131ef521..89b8532b 100644
--- a/scala-fx/src/main/scala/fx/Fiber.scala
+++ b/scala-fx/src/main/scala/fx/Fiber.scala
@@ -2,6 +2,7 @@ package fx
 
 import java.util.concurrent.Future
 import java.util.concurrent.CompletableFuture
+import java.util.concurrent.CompletionException
 
 opaque type Fiber[A] = Future[A]
 
@@ -20,7 +21,8 @@ def uncancellable[A](fn: () => A): A = {
         case t: Throwable =>
           promise.completeExceptionally(t)
     })
-  promise.join
+  try promise.join
+  catch case e: CompletionException => throw e.getCause
 }
 
 def fork[B](f: () => B)(using structured: Structured): Fiber[B] =
diff --git a/scala-fx/src/main/scala/fx/Resource.scala b/scala-fx/src/main/scala/fx/Resource.scala
index 913546b7..c8a34055 100644
--- a/scala-fx/src/main/scala/fx/Resource.scala
+++ b/scala-fx/src/main/scala/fx/Resource.scala
@@ -6,24 +6,24 @@ import Tuple.{InverseMap, IsMappedBy, Map}
 import scala.annotation.implicitNotFound
 
 class Resource[A](
-    val acquire: Resources ?=> A,
+    val acquire: Resources ?=> () => A,
     val release: (A, ExitCase) => Unit
 ):
 
-  def this(value: Resources ?=> A) = this(value, (_, _) => ())
+  def this(value: Resources ?=> () => A) = this(value, (_, _) => ())
 
-  def use[B](f: A => B): B = bracketCase(() => acquire, f, release)
+  def use[B](f: A => B): B = bracketCase(acquire, f, release)
 
   def map[B](f: (A) => B): Resource[B] =
-    Resource(f(this.bind))
+    Resource(() => f(this.bind))
 
   def flatMap[B](f: (A) => Resource[B]): Resource[B] =
-    Resource(f(this.bind).bind)
+    Resource(() => f(this.bind).bind)
 
   def bind: A =
     bracketCase(
       () => {
-        val a = acquire
+        val a = acquire()
         val finalizer: (ExitCase) => Unit = (ex: ExitCase) => release(a, ex)
         summon[Resources].finalizers.updateAndGet(finalizer +: _)
         a
diff --git a/scala-fx/src/main/scala/fx/Use.scala b/scala-fx/src/main/scala/fx/Use.scala
index 2a703f36..1868a3aa 100644
--- a/scala-fx/src/main/scala/fx/Use.scala
+++ b/scala-fx/src/main/scala/fx/Use.scala
@@ -77,9 +77,11 @@ inline def bracketCase[A, B](
   val res =
     try use(acquired)
     catch
-      case (e: CancellationException) =>
+      case e: InterruptedException =>
         runReleaseAndRethrow(e, () => release(acquired, ExitCase.Cancelled(e)))
-      case (e: ExecutionException) =>
+      case e: CancellationException =>
+        runReleaseAndRethrow(e, () => release(acquired, ExitCase.Cancelled(e)))
+      case e: ExecutionException =>
         runReleaseAndRethrow(
           e.getCause,
           () => release(acquired, ExitCase.Cancelled(e.getCause))
diff --git a/scala-fx/src/test/scala/fx/BracketTests.scala b/scala-fx/src/test/scala/fx/BracketTests.scala
new file mode 100644
index 00000000..debafee0
--- /dev/null
+++ b/scala-fx/src/test/scala/fx/BracketTests.scala
@@ -0,0 +1,63 @@
+package fx
+
+import fx.ResourcesTests.property
+import org.scalacheck.Prop.forAll
+import org.scalacheck.Properties
+
+import java.util.concurrent.{CompletableFuture, CompletionException}
+
+object BracketTests extends Properties("Bracket Tests"):
+
+  property("bracketCase identity") = forAll { (n: Int) =>
+    bracketCase(() => n, identity, (_, _) => ()) == n
+  }
+
+  case class CustomEx(val token: String) extends RuntimeException
+
+  property("bracketCase exception identity") = forAll { (msg: String) =>
+    val res =
+      try
+        bracketCase(
+          () => throw CustomEx(msg),
+          _ => throw RuntimeException("Cannot come here"),
+          (_, _) => ())
+      catch case CustomEx(msg) => msg
+
+    res == msg
+  }
+
+  property("bracketCase must run release task on use error") = forAll { (msg: String) =>
+    val promise = new CompletableFuture[ExitCase]
+    val res =
+      try bracketCase(() => (), _ => throw CustomEx(msg), (_, ex) => promise.complete(ex))
+      catch case CustomEx(msg) => msg
+
+    res == msg && promise.join() == ExitCase.Failure(CustomEx(msg))
+  }
+
+  property("bracketCase must run release task on use success") = forAll { (msg: String) =>
+    val promise = new CompletableFuture[ExitCase]
+    val res = bracketCase(() => (), _ => msg, (_, ex) => promise.complete(ex))
+
+    res == msg && promise.join() == ExitCase.Completed
+  }
+
+  property("bracketCase cancellation in use") = forAll { (msg: String) =>
+    val latch = new CompletableFuture[Unit]
+    val promise = new CompletableFuture[ExitCase]
+    structured {
+      val fiber = fork(() =>
+        bracketCase(
+          () => (),
+          _ => {
+            latch.complete(())
+            Thread.sleep(100_000)
+          },
+          (_, ex) => promise.complete(ex)))
+      latch.join()
+      fiber.cancel()
+      promise.join().isInstanceOf[ExitCase.Cancelled]
+    }
+  }
+
+end BracketTests
diff --git a/scala-fx/src/test/scala/fx/ResourcesTests.scala b/scala-fx/src/test/scala/fx/ResourcesTests.scala
index 407f162c..4f2cb3c8 100644
--- a/scala-fx/src/test/scala/fx/ResourcesTests.scala
+++ b/scala-fx/src/test/scala/fx/ResourcesTests.scala
@@ -10,13 +10,13 @@ import java.util.concurrent.ExecutionException
 object ResourcesTests extends Properties("Resources Tests"):
 
   property("Can consume resource") = forAll { (n: Int) =>
-    val r = Resource(n, (_, _) => ())
+    val r = Resource(() => n, (_, _) => ())
     r.use(_ + 1) == n + 1
   }
 
   property("value resource is released with Complete") = forAll { (n: Int) =>
     val p = CompletableFuture[ExitCase]()
-    val r = Resource(n, (_, ex) => require(p.complete(ex)))
+    val r = Resource(() => n, (_, ex) => require(p.complete(ex)))
     r.use(_ => ())
     p.join == ExitCase.Completed
   }
@@ -25,13 +25,13 @@ object ResourcesTests extends Properties("Resources Tests"):
 
   property("error resource finishes with error") = forAll { (n: String) =>
     val p = CompletableFuture[ExitCase]()
-    val r = Resource[Int](throw CustomEx(n), (_, ex) => require(p.complete(ex)))
+    val r = Resource[Int](() => throw CustomEx(n), (_, ex) => require(p.complete(ex)))
     val result =
       try
         r.use(_ + 1)
         "unexpected"
-      catch case e: CompletionException => e.getCause.asInstanceOf[CustomEx].token
-    result == n
+      catch case CustomEx(msg) => msg
+    n == result
   }
 
 end ResourcesTests
diff --git a/scala-fx/src/test/scala/fx/UncancellableTests.scala b/scala-fx/src/test/scala/fx/UncancellableTests.scala
new file mode 100644
index 00000000..5d80b119
--- /dev/null
+++ b/scala-fx/src/test/scala/fx/UncancellableTests.scala
@@ -0,0 +1,46 @@
+package fx
+
+import fx.ResourcesTests.property
+import org.scalacheck.Prop.forAll
+import org.scalacheck.Properties
+
+import java.util.concurrent.{CompletableFuture, CompletionException}
+
+object UncancellableTests extends Properties("Bracket Tests"):
+
+  property("uncancellable identity") = forAll { (n: Int) => uncancellable(() => n) == n }
+
+  case class CustomEx(val token: String) extends RuntimeException
+
+  property("uncancellable exception identity") = forAll { (msg: String) =>
+    val res =
+      try uncancellable(() => throw CustomEx(msg))
+      catch case CustomEx(msg) => msg
+
+    res == msg
+  }
+
+//  "Uncancellable back pressures withTimeoutOrNull" {
+//    runBlockingTest {
+//      checkAll(Arb.long(50, 100), Arb.long(300, 400)) {
+//        a
+//        , b ->
+//        val start = currentTime
+//
+//        val n = withTimeoutOrNull(a.milliseconds) {
+//          uncancellable {
+//            delay(b.milliseconds)
+//          }
+//        }
+//
+//        val duration = currentTime - start
+//
+//        n shouldBe null // timed-out so should be null
+//        require((duration) >= b) {
+//          "Should've taken longer than $b milliseconds, but took $duration"
+//        }
+//      }
+//    }
+//  }
+
+end UncancellableTests
diff --git a/sttp-scala-fx/src/test/scala/sttp/fx/HttpExtensionsSuiteFixtures.scala b/sttp-scala-fx/src/test/scala/sttp/fx/HttpExtensionsSuiteFixtures.scala
index fa1be4f4..a0b585d1 100644
--- a/sttp-scala-fx/src/test/scala/sttp/fx/HttpExtensionsSuiteFixtures.scala
+++ b/sttp-scala-fx/src/test/scala/sttp/fx/HttpExtensionsSuiteFixtures.scala
@@ -21,10 +21,10 @@ trait HttpExtensionsSuiteFixtures { self: ScalaFXSuite =>
       setup = _ => {
         for {
           server <- Resource(
-            HttpServer.create(InetSocketAddress(0), 0),
+            () => HttpServer.create(InetSocketAddress(0), 0),
             (server, _) => server.stop(0))
           serverExecutor <- Resource(
-            Executors.newVirtualThreadPerTaskExecutor,
+            () => Executors.newVirtualThreadPerTaskExecutor,
             (executor, _) => executor.shutdown())
           _ = server.setExecutor(serverExecutor)
           httpContext = server.createContext("/root", handler)
diff --git a/sttp-scala-fx/src/test/scala/sttp/fx/ToHttpBodyMapperFixtures.scala b/sttp-scala-fx/src/test/scala/sttp/fx/ToHttpBodyMapperFixtures.scala
index 981eb841..06b2333f 100644
--- a/sttp-scala-fx/src/test/scala/sttp/fx/ToHttpBodyMapperFixtures.scala
+++ b/sttp-scala-fx/src/test/scala/sttp/fx/ToHttpBodyMapperFixtures.scala
@@ -39,7 +39,7 @@ trait ToHttpBodyMapperFixtures { self: ScalaFXSuite =>
   val fileBody = FunFixture(
     setup = _ => {
       Resource.apply(
-        {
+        () => {
           val file = Files.createTempFile("fileBodyTest", ".txt")
           Files.write(file, "test".getBytes())
           FileBody(SttpFile.fromPath(file))