diff --git a/examples/cfs-coffee/test-coffee.c b/examples/cfs-coffee/test-coffee.c
index 9f134ae44..28cd3b5c6 100644
--- a/examples/cfs-coffee/test-coffee.c
+++ b/examples/cfs-coffee/test-coffee.c
@@ -276,8 +276,8 @@ coffee_test_modify(void)
 
     offset = random_rand() % FILE_SIZE;
 
-    for(r = 0; r < sizeof(buf); r++) {
-      buf[r] = r;
+    for(i = 0; i < sizeof(buf); i++) {
+      buf[i] = i;
     }
 
     if(cfs_seek(wfd, offset, CFS_SEEK_SET) != offset) {
@@ -303,6 +303,8 @@ coffee_test_modify(void)
         TEST_FAIL(8);
       }
     }
+
+    cfs_close(wfd);
   }
 
   error = 0;
diff --git a/regression-tests/03-base/02-sky-coffee.csc b/regression-tests/03-base/02-sky-coffee.csc
index 035f72843..050b4abc9 100644
--- a/regression-tests/03-base/02-sky-coffee.csc
+++ b/regression-tests/03-base/02-sky-coffee.csc
@@ -89,7 +89,7 @@ make test-coffee.sky TARGET=sky</commands>
   <plugin>
     org.contikios.cooja.plugins.ScriptRunner
     <plugin_config>
-      <script>TIMEOUT(80000);
+      <script>TIMEOUT(180000);
 
 fileOK = null;
 gcOK = null;