diff --git a/hledger/test/add.test b/hledger/test/add.test
index 912aaef94..fba1cd7c1 100644
--- a/hledger/test/add.test
+++ b/hledger/test/add.test
@@ -203,7 +203,25 @@ $ rm -f nosuch.journal; hledger -f nosuch.journal add; rm -f nosuch.journal
 > /Save this transaction to the journal/
 >2 //
 
-## 15. shouldn't add decimals if there aren't any
+## 15. Assertion combined with posting date
+<
+2025-05-10
+x
+(a)
+10
+.
+y
+2025-05-10
+x2
+(a)
+3 = 3  ; date:2025-05-01
+.
+$ rm -f nosuch.journal; hledger -f nosuch.journal add; rm -f nosuch.journal
+> /\(a\)[[:space:]]+3 = 3  ;  date:2025-05-01/
+>2 //
+
+
+## 16. shouldn't add decimals if there aren't any
 ## printf '\n\na\n1\nb\n' | hledger -f /dev/null add
 # <
 #