diff --git a/unicodetools/src/main/resources/org/unicode/text/UCD/UnicodeInvariantTest.txt b/unicodetools/src/main/resources/org/unicode/text/UCD/UnicodeInvariantTest.txt
index 58b2b8960..34c9de0d2 100644
--- a/unicodetools/src/main/resources/org/unicode/text/UCD/UnicodeInvariantTest.txt
+++ b/unicodetools/src/main/resources/org/unicode/text/UCD/UnicodeInvariantTest.txt
@@ -848,7 +848,7 @@ Let $QUInclusions := [\u275F-\u2760 \U0001F676-\U0001F678 \u0022 \u0027 \u275B-\
 # behaviour requires the prohibition of line breaks on either side should have
 # class GL.
 \p{LB=WJ} = [\N{WORD JOINER} \N{ZERO WIDTH NO-BREAK SPACE}]
-\p{LB=ZW} = \N{ZERO WIDTH SPACE}
+\p{LB=ZW} = [\N{ZERO WIDTH SPACE}]
 
 \p{LB=ZWJ} = [\u200D]
 \p{LB=RI} = \p{RI=Y}