diff --git a/src/FsUnit.Xunit/FsUnitTyped.fs b/src/FsUnit.Xunit/FsUnitTyped.fs
index 8f8c29cc..65d904e2 100644
--- a/src/FsUnit.Xunit/FsUnitTyped.fs
+++ b/src/FsUnit.Xunit/FsUnitTyped.fs
@@ -7,13 +7,13 @@ open FsUnit.Xunit
 module TopLevelOperators =
 
     /// Asserts that `expected` is equal to `actual`.
-    /// The equality instance on `expected` is used.
+    /// The equality instance on `expected` is used, if available.
     [<DebuggerStepThrough>]
     let shouldEqual<'a> (expected: 'a) (actual: 'a) =
-        should equal actual expected
+        should equal expected actual
 
     /// Asserts that `expected` is not equal to `actual`.
-    /// The equality instance on `expected` is used.
+    /// The equality instance on `expected` is used, if available.
     [<DebuggerStepThrough>]
     let shouldNotEqual<'a> (expected: 'a) (actual: 'a) =
         should not' (equal actual) expected
diff --git a/tests/FsUnit.Xunit.Test/equalTests.fs b/tests/FsUnit.Xunit.Test/equalTests.fs
index e27684c7..9e0942b7 100644
--- a/tests/FsUnit.Xunit.Test/equalTests.fs
+++ b/tests/FsUnit.Xunit.Test/equalTests.fs
@@ -61,6 +61,10 @@ type ``equal Tests``() =
     member __.``reference type should fail to not equal itself``() =
         anObj |> should equal anObj
 
+    [<Fact>]
+    member __.``should pass when Equals returns true``() =
+        anObj |> should equal (box(new AlwaysEqual()))
+
     [<Fact>]
     member __.``should fail when Equals returns false``() =
         anObj |> should not' (equal(NeverEqual()))
@@ -69,6 +73,10 @@ type ``equal Tests``() =
     member __.``should pass when negated and Equals returns false``() =
         anObj |> should not' (equal(NeverEqual()))
 
+    [<Fact>]
+    member __.``should fail when negated and Equals returns true``() =
+        shouldFail(fun () -> anObj |> should not' (equal(box(new AlwaysEqual()))))
+
     [<Fact>]
     member __.``should pass when comparing two lists that have the same values``() =
         [ 1 ] |> should equal [ 1 ]