diff --git a/testprograms/YAML-Test/eelsbosin001.yml b/testprograms/YAML-Test/eelsbosin001.yaml
similarity index 100%
rename from testprograms/YAML-Test/eelsbosin001.yml
rename to testprograms/YAML-Test/eelsbosin001.yaml
diff --git a/testprograms/YAML-Test/test2.f90 b/testprograms/YAML-Test/test2.f90
index 09f4e598443c16feee2248c8d5c5e4a0b7de26c1..9e192996d4cda47b9bced7e000c6694e3ae48387 100644
--- a/testprograms/YAML-Test/test2.f90
+++ b/testprograms/YAML-Test/test2.f90
@@ -20,7 +20,7 @@ program test
 
   write (*,*) 'Program test'
 
-  call file%parse("eelsbosin001.yml", err)
+  call file%parse("eelsbosin001.yaml", err)
   if (allocated(err)) then
     write (*,*) err
     stop 1
diff --git a/tests/inputFiles/eelsbosin001.yml b/tests/inputFiles/eelsbosin001.yaml
similarity index 100%
rename from tests/inputFiles/eelsbosin001.yml
rename to tests/inputFiles/eelsbosin001.yaml