diff --git a/testrepo/src/Test.mjs b/testrepo/src/Test.mjs
index d60faa78..f12f71f8 100644
--- a/testrepo/src/Test.mjs
+++ b/testrepo/src/Test.mjs
@@ -3,7 +3,10 @@
 
 var hello = "world";
 
+var a = 0;
+
 export {
   hello ,
+  a ,
 }
 /* No side effect */
diff --git a/testrepo/src/Test.res b/testrepo/src/Test.res
index cab79024..5ed5cf69 100644
--- a/testrepo/src/Test.res
+++ b/testrepo/src/Test.res
@@ -1 +1,4 @@
 let hello = "world"
+
+@genType
+let a = 0
diff --git a/tests/compile.sh b/tests/compile.sh
index 2b7173ee..31bbcf3a 100755
--- a/tests/compile.sh
+++ b/tests/compile.sh
@@ -30,6 +30,14 @@ else
   exit 1
 fi
 
+if ls ./src/*.gen.* 1> /dev/null 2>&1;
+then
+  success ".gen.* files found"
+else
+  error ".gen.* files not found"
+  exit 1
+fi
+
 node ./packages/main/src/Main.mjs > ./packages/main/src/output.txt
 
 mv ./packages/main/src/Main.res ./packages/main/src/Main2.res
@@ -105,4 +113,4 @@ else
   done
 
   exit 1
-fi
\ No newline at end of file
+fi