diff --git a/+stdlib/wslpath2winpath.m b/+stdlib/wslpath2winpath.m
index 5e521de..1d17fd2 100644
--- a/+stdlib/wslpath2winpath.m
+++ b/+stdlib/wslpath2winpath.m
@@ -1,6 +1,7 @@
 function win_path = wslpath2winpath(wsl_path)
 %% wslpath2winpath(wsl_path)
 % Convert a WSL path to a Windows path
+% PATH MUST EXIST IN WSL
 % output format is like \\wsl$\Ubuntu\home\username\...
 arguments (Input)
   wsl_path (1,1) string {mustBeNonzeroLengthText}
diff --git a/test/TestWSL.m b/test/TestWSL.m
index 7b7a825..e22d864 100644
--- a/test/TestWSL.m
+++ b/test/TestWSL.m
@@ -49,7 +49,9 @@ function test_wsl_path(tc)
 wsl_temp = stdlib.sys.wsl_tempfile();
 tc.verifyNotEmpty(wsl_temp, "could not get WSL tempfile")
 
-wsl_path = stdlib.wslpath2winpath(wsl_temp);
+wsl_path = stdlib.wslpath2winpath("~");
+% can't use wsl_temp as new WSL spawned might have erased it.
+tc.verifyNotEqual(wsl_path, "~")
 tc.verifyTrue(stdlib.is_wsl_path(wsl_path), "could not convert WSL path to Windows path")
 
 win_path = stdlib.winpath2wslpath(wsl_path);