diff --git a/tests/Collections/LazyTest.php b/tests/Collections/LazyTest.php
index 3897030..25dc805 100644
--- a/tests/Collections/LazyTest.php
+++ b/tests/Collections/LazyTest.php
@@ -65,17 +65,6 @@ class LazyTest extends \PHPUnit\Framework\TestCase
         $this->assertSame(6, $walked);
     }
 
-    public function testLazyChainWorksWithPipe()
-    {
-        $result = self::naturals()
-            |> lazy\map(static fn ($x) => $x * 2)
-            |> lazy\skip(1)
-            |> lazy\take(2)
-            |> c\toArray();
-
-        $this->assertSame([1 => 4, 2 => 6], $result);
-    }
-
     public static function provideEagerEquivalents(): iterable
     {
         $double = static fn ($x) => $x * 2;
@@ -88,6 +77,7 @@ class LazyTest extends \PHPUnit\Framework\TestCase
         yield 'reject'       => [fn () => lazy\reject($isTwo), fn () => c\reject($isTwo)];
         yield 'flatMap'      => [fn () => lazy\flatMap($inner), fn () => c\flatMap($inner)];
         yield 'values'       => [fn () => lazy\values(), fn () => c\values()];
+        yield 'keys'         => [fn () => lazy\keys(), fn () => c\keys()];
         yield 'unique'       => [fn () => lazy\unique(), fn () => c\unique()];
         yield 'uniqueBy'     => [fn () => lazy\uniqueBy($double), fn () => c\uniqueBy($double)];
         yield 'slice'        => [fn () => lazy\slice(1, 1), fn () => c\slice(1, 1)];
@@ -111,14 +101,6 @@ class LazyTest extends \PHPUnit\Framework\TestCase
         $this->assertSame($eager()($fixture), iterator_to_array($lazy()($fixture)));
     }
 
-    public function testKeysMatchesEager()
-    {
-        $fixture = ['a' => 1, 'b' => 2];
-
-        $this->assertSame(['a', 'b'], iterator_to_array(lazy\keys()($fixture)));
-        $this->assertSame([0, 1], array_keys(iterator_to_array(lazy\keys()($fixture))));
-    }
-
     public function testLazyUniqueStreams()
     {
         $walked = 0;
@@ -169,11 +151,6 @@ class LazyTest extends \PHPUnit\Framework\TestCase
         lazy\skip(-1);
     }
 
-    public function testTakeStopsPullingTheSource()
-    {
-        $this->assertSame([1, 2], array_values(iterator_to_array(lazy\take(2)(self::naturals()))));
-    }
-
     public function testEachYieldsEverythingThroughWithKeys()
     {
         $seen = [];
@@ -183,7 +160,7 @@ class LazyTest extends \PHPUnit\Framework\TestCase
         $this->assertSame([['a', 1], ['b', 2]], $seen);
     }
 
-    public function testCallbackIsResolvedOncePerStep()
+    public function testStepCanBeReusedAcrossInputs()
     {
         $step = lazy\map(static fn ($x) => $x + 1);