CI: fix tests

Change-Id: I48db4254cc47bc781967c76d2527fbfb48d95848
diff --git a/tests/testthat/test-collocations.R b/tests/testthat/test-collocations.R
index 60052a6..b0c7a7a 100644
--- a/tests/testthat/test-collocations.R
+++ b/tests/testthat/test-collocations.R
@@ -48,7 +48,7 @@
 
 
 test_that("mergeDuplicateCollocatesWorksAsExpected", {
-  ldf <- tibble(
+  ldf <- tibble::tibble(
     node = c("focus(in [tt/p=NN] {[tt/l=nehmen]})"),
     collocate = c("Anspruch"),
     label = c(""),
@@ -71,7 +71,7 @@
     logDice = c(11.6899933757298),
     ll = c(3717716.74208791)
   )
-  rdf <- tibble(
+  rdf <- tibble::tibble(
     node = c("focus({[tt/l=nehmen] in} [tt/p=NN])"),
     collocate = c("Anspruch"),
     label = c(""),