Check for linking multiple ES shaders to the same stage
diff --git a/gtests/Link.FromFile.cpp b/gtests/Link.FromFile.cpp
index 6db43d9..331c5b2 100644
--- a/gtests/Link.FromFile.cpp
+++ b/gtests/Link.FromFile.cpp
@@ -99,6 +99,7 @@
         {"empty.frag", "empty2.frag", "empty3.frag"},
         {"150.tesc", "150.tese", "400.tesc", "400.tese", "410.tesc", "420.tesc", "420.tese"},
         {"max_vertices_0.geom"},
+        {"es-link1.frag", "es-link2.frag"},
     })),
 );
 // clang-format on