diff --git a/tests/test_latexmkopt.py b/tests/test_latexmkopt.py
index 15ef6f5..875bcb1 100644
--- a/tests/test_latexmkopt.py
+++ b/tests/test_latexmkopt.py
@@ -40,12 +40,12 @@ def test_auto_pdf(self, basic_opts):
 
     def test_ps(self, basic_opts):
         """Check: Processing using -ps"""
-        basic_opts.extend(["--latexmk_tex", "ps"])
+        basic_opts.extend(["--latexmk-tex", "ps"])
         t = TarTeX(basic_opts)
         t.tar_files()
 
     def test_pdflua(self, basic_opts):
         """Check: Processing using -pdflua"""
-        basic_opts.extend(["--latexmk_tex", "pdflua"])
+        basic_opts.extend(["--latexmk-tex", "pdflua"])
         t = TarTeX(basic_opts)
         t.tar_files()