diff --git a/t/chainlint.sed b/t/chainlint.sed
index 2901494e8a..afb2443a9c 100644
--- a/t/chainlint.sed
+++ b/t/chainlint.sed
@@ -216,7 +216,7 @@ s/.*\n//
 # "$(...)" -- command substitution; not closing ")"
 /\$([^)][^)]*)[^)]*$/bcheckchain
 # multi-line "$(...\n...)" -- command substitution; treat as nested subshell
-/\$([ 	]*$/bnest
+/\$([^)]*$/bnest
 # "=(...)" -- Bash array assignment; not closing ")"
 /=(/bcheckchain
 # closing "...) &&"
diff --git a/t/chainlint/multi-line-nested-command-substitution.expect b/t/chainlint/multi-line-nested-command-substitution.expect
index 19c023b1c8..59b6c8b850 100644
--- a/t/chainlint/multi-line-nested-command-substitution.expect
+++ b/t/chainlint/multi-line-nested-command-substitution.expect
@@ -6,4 +6,13 @@
 >>	) &&
 	echo ok
 >) |
-sort
+sort &&
+(
+	bar &&
+	x=$(echo bar |
+		cat
+>>	) &&
+	y=$(echo baz |
+>>		fip) &&
+	echo fail
+>)
diff --git a/t/chainlint/multi-line-nested-command-substitution.test b/t/chainlint/multi-line-nested-command-substitution.test
index ca0620ab6b..300058341b 100644
--- a/t/chainlint/multi-line-nested-command-substitution.test
+++ b/t/chainlint/multi-line-nested-command-substitution.test
@@ -6,4 +6,13 @@
 	) &&
 	echo ok
 ) |
-sort
+sort &&
+(
+	bar &&
+	x=$(echo bar |
+		cat
+	) &&
+	y=$(echo baz |
+		fip) &&
+	echo fail
+)