diff --git a/src/Tests/PolyfillTests_IEnumerable_MinMax.cs b/src/Tests/PolyfillTests_IEnumerable_MinMax.cs
index 8526e98..f6e8728 100644
--- a/src/Tests/PolyfillTests_IEnumerable_MinMax.cs
+++ b/src/Tests/PolyfillTests_IEnumerable_MinMax.cs
@@ -1,14 +1,14 @@
 partial class PolyfillTests
 {
-    static readonly ReverseComparer reverseComparer = new();
+    static ReverseComparer reverseComparer = new();
 
-    static readonly IEnumerable<int> comparableValues = [1, 2];
-    static readonly IEnumerable<int?> comparableNullables = [null, 1, 2];
-    static readonly IEnumerable<string?> comparableReferences = [null, "ab", "baa"];
+    static IEnumerable<int> comparableValues = [1, 2];
+    static IEnumerable<int?> comparableNullables = [null, 1, 2];
+    static IEnumerable<string?> comparableReferences = [null, "ab", "baa"];
 
-    static readonly IEnumerable<int> emptyValues = [];
-    static readonly IEnumerable<int?> emptyNullables = [];
-    static readonly IEnumerable<string?> emptyReferences = [];
+    static IEnumerable<int> emptyValues = [];
+    static IEnumerable<int?> emptyNullables = [];
+    static IEnumerable<string?> emptyReferences = [];
 
     static void AssertThrowsNoElementsException(TestDelegate code) =>
         Assert.AreEqual("Sequence contains no elements",