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-rw-r--r--tests/store.scm4
1 files changed, 3 insertions, 1 deletions
diff --git a/tests/store.scm b/tests/store.scm
index 2150a0048c..5c9f651d6c 100644
--- a/tests/store.scm
+++ b/tests/store.scm
@@ -759,7 +759,9 @@
(test-assert "substitute, deduplication"
(with-store s
- (let* ((c (random-text)) ; contents of the output
+ ;; Note: C must be longer than %DEDUPLICATION-MINIMUM-SIZE.
+ (let* ((c (string-concatenate
+ (make-list 200 (random-text)))) ; contents of the output
(g (package-derivation s %bootstrap-guile))
(d1 (build-expression->derivation s "substitute-me"
`(begin ,c (exit 1))