diff --git a/appveyor.yml b/appveyor.yml
index 52993558a5..11f16b5df8 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -62,7 +62,7 @@ test_script:
   - dir ..\test\gie
   - echo "Contents of PROJ_LIB " %PROJ_LIB%
   - dir %PROJ_LIB%
-  - gie.exe ..\test\gie\*.gie
+  - gie.exe ..\test\gie\*.gie ..\test\gigs\*.gie
 
 deploy: off
 
diff --git a/test/gigs/5101.4-jhs.gie_failing b/test/gigs/5101.4-jhs.gie.failing
similarity index 100%
rename from test/gigs/5101.4-jhs.gie_failing
rename to test/gigs/5101.4-jhs.gie.failing
diff --git a/test/gigs/5102.2.gie_failing b/test/gigs/5102.2.gie.failing
similarity index 100%
rename from test/gigs/5102.2.gie_failing
rename to test/gigs/5102.2.gie.failing
diff --git a/test/gigs/5104.gie_failing b/test/gigs/5104.gie.failing
similarity index 100%
rename from test/gigs/5104.gie_failing
rename to test/gigs/5104.gie.failing
diff --git a/test/gigs/5105.1.gie_failing b/test/gigs/5105.1.gie.failing
similarity index 100%
rename from test/gigs/5105.1.gie_failing
rename to test/gigs/5105.1.gie.failing
diff --git a/test/gigs/5108.gie_failing b/test/gigs/5108.gie.failing
similarity index 100%
rename from test/gigs/5108.gie_failing
rename to test/gigs/5108.gie.failing
diff --git a/test/gigs/5110.gie_failing b/test/gigs/5110.gie.failing
similarity index 100%
rename from test/gigs/5110.gie_failing
rename to test/gigs/5110.gie.failing
diff --git a/test/gigs/5111.2.gie_failing b/test/gigs/5111.2.gie.failing
similarity index 100%
rename from test/gigs/5111.2.gie_failing
rename to test/gigs/5111.2.gie.failing
diff --git a/test/gigs/5203.1.gie_failing b/test/gigs/5203.1.gie.failing
similarity index 100%
rename from test/gigs/5203.1.gie_failing
rename to test/gigs/5203.1.gie.failing
diff --git a/test/gigs/5204.1.gie_failing b/test/gigs/5204.1.gie.failing
similarity index 100%
rename from test/gigs/5204.1.gie_failing
rename to test/gigs/5204.1.gie.failing
diff --git a/test/gigs/5205.1.gie_failing b/test/gigs/5205.1.gie.failing
similarity index 100%
rename from test/gigs/5205.1.gie_failing
rename to test/gigs/5205.1.gie.failing
diff --git a/test/gigs/5206.gie_failing b/test/gigs/5206.gie.failing
similarity index 100%
rename from test/gigs/5206.gie_failing
rename to test/gigs/5206.gie.failing
diff --git a/test/gigs/5207.1.gie_failing b/test/gigs/5207.1.gie.failing
similarity index 100%
rename from test/gigs/5207.1.gie_failing
rename to test/gigs/5207.1.gie.failing
diff --git a/test/gigs/5207.2.gie_failing b/test/gigs/5207.2.gie.failing
similarity index 100%
rename from test/gigs/5207.2.gie_failing
rename to test/gigs/5207.2.gie.failing