diff --git a/test/completion/test_public_completion_api.vader b/test/completion/test_public_completion_api.vader
index c3cd42b8..f26fdc12 100644
--- a/test/completion/test_public_completion_api.vader
+++ b/test/completion/test_public_completion_api.vader
@@ -37,6 +37,7 @@ Execute(ale#completion#GetCompletionPositionForDeoplete() should return the posi
   AssertEqual 4, ale#completion#GetCompletionPositionForDeoplete('foo bar')
 
 Execute(ale#completion#CanProvideCompletions should return 0 when no completion sources are available):
+  let b:ale_linters = ['flake8']
   AssertEqual 0, ale#completion#CanProvideCompletions()
 
 Execute(ale#completion#CanProvideCompletions should return 1 when at least one completion source is available):