diff --git a/src/test/unittests/synergy/ArgParserTests.cpp b/src/test/unittests/synergy/ArgParserTests.cpp
index 7069d1ad6..b7d3b6df1 100644
--- a/src/test/unittests/synergy/ArgParserTests.cpp
+++ b/src/test/unittests/synergy/ArgParserTests.cpp
@@ -224,5 +224,8 @@ TEST(ArgParserTests, parseToolArgs_matches_correspondingly)
         EXPECT_TRUE(parser.parseToolArgs(toolArgs, 2, twoArgs));
         EXPECT_TRUE(test.second(toolArgs));
     }
+    ToolArgs toolArgs;
+    const char *twoArgs[2] {"syntool", "--garbage"};
+    EXPECT_FALSE(parser.parseToolArgs(toolArgs, 2, twoArgs));
 }