Update

test/runtests.jl

@@ -14,13 +14,15 @@ using Test
 using Xpress
 
 function test_licensing()
+    ret = ENV["XPAUTH_PATH"]
     # Create a bogus license file
     xpauth_path = mktempdir()
     filename = joinpath(xpauth_path, "xpauth.xpr")
     write(filename, "bogus_license")
     # Test that passing `""` can find our current license. This should already
     # be the case because we managed to install and start the tests...
     @test isfile(Xpress._get_xpauthpath("", false))
+    delete!(ENV, "XPAUTH_PATH")
     # Test that using the test directory cannot find a license.
     @test_throws ErrorException Xpress._get_xpauthpath(@__DIR__, false)
     # Now're going to test checking for new licenses. To do so, we first need to
@@ -29,6 +31,7 @@ function test_licensing()
     # Then, we can check that using the root fails to find a license
     @test_throws Xpress.XpressError Xpress.initialize(; xpauth_path)
     # Now we need to re-initialize the license so that we can run other tests.
+    ENV["XPAUTH_PATH"] = ret
     Xpress.initialize()
     return
 end