Test different Appveyor MinGW installation
diff --git a/appveyor.yml b/appveyor.yml
index 0bbf351..24867b7 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -18,14 +18,14 @@
     - compiler: msvc-14-seh
       generator: "Visual Studio 14 2015 Win64"
 
-    - compiler: gcc-4.9.2-posix
-      generator: "MinGW Makefiles"
-      cxx_path: 'C:\MinGW\bin'
-
-    - compiler: gcc-4.9.2-posix
+    - compiler: gcc-5.3.0-posix
       generator: "MinGW Makefiles"
       cxx_path: 'C:\mingw-w64\i686-5.3.0-posix-dwarf-rt_v4-rev0\mingw32\bin'
 
+    - compiler: gcc-4.9.3-posix
+      generator: "MinGW Makefiles"
+      cxx_path: 'C:\MinGW\bin'
+
 matrix:
   fast_finish: true