diff --git a/flang/test/Driver/lto-flags.f90 b/flang/test/Driver/lto-flags.f90
--- a/flang/test/Driver/lto-flags.f90
+++ b/flang/test/Driver/lto-flags.f90
@@ -1,4 +1,5 @@
-! UNSUPPORTED: system-windows
+! Solaris ld doesn't support the linker plugin interface
+! UNSUPPORTED: system-windows, system-solaris
 ! RUN: %flang -### -S %s 2>&1 | FileCheck %s --check-prefix=NO-LTO
 ! RUN: %flang -### -S -fno-lto %s 2>&1 | FileCheck %s --check-prefix=NO-LTO