diff --git a/Project.toml b/Project.toml
index d9e3618..144f706 100644
--- a/Project.toml
+++ b/Project.toml
@@ -1,7 +1,7 @@
 name = "PkgAuthentication"
 uuid = "4722fa14-9d28-45f9-a1e2-a38605bd88f0"
 authors = ["Sebastian Pfitzner", "contributors"]
-version = "2.1.0"
+version = "2.1.1"
 
 [deps]
 Downloads = "f43a241f-c20a-4ad4-852c-f6b1247861c6"
diff --git a/src/helpers.jl b/src/helpers.jl
index 6a9eda9..c03ecc2 100644
--- a/src/helpers.jl
+++ b/src/helpers.jl
@@ -6,7 +6,7 @@ else
     # https://github.com/JuliaLang/julia/pull/57069
     function detectwsl()
         # We use the same approach as canonical/snapd do to detect WSL
-        islinux() && (
+        Sys.islinux() && (
             isfile("/proc/sys/fs/binfmt_misc/WSLInterop")
             || isdir("/run/WSL")
         )
diff --git a/test/utilities_test.jl b/test/utilities_test.jl
index c9b13ec..bfcab0a 100644
--- a/test/utilities_test.jl
+++ b/test/utilities_test.jl
@@ -8,4 +8,6 @@
     @test PkgAuthentication.assert_dict_keys(Dict("bar" => 0), "foo", "bar"; msg="") === nothing
     @test_throws ErrorException PkgAuthentication.assert_dict_keys(Dict(), "foo", "bar"; msg="")
     @test_throws ErrorException PkgAuthentication.assert_dict_keys(Dict("baz" => 0), "foo", "bar"; msg="")
+
+    @test PkgAuthentication.detectwsl() isa Bool
 end