diff --git a/tests/main.zunit b/tests/main.zunit
index c0b76e4..7fb9189 100644
--- a/tests/main.zunit
+++ b/tests/main.zunit
@@ -88,4 +88,19 @@ reply=()
     assert "$reply[6]" same_as ""
 }
 
+@test 'tr : \\n <<<$PATH' {
+    reply=()
+    PREBUFFER=""
+    BUFFER='command tr : \\n <<<test$PATH'
+    evl -fast-highlight-process "\$PREBUFFER" "\$BUFFER" 0
+
+    assert "$reply[1]" same_as "0 7 ${FAST_HIGHLIGHT_STYLES[${FAST_THEME_NAME}precommand]}"
+    assert "$reply[2]" same_as "8 10 ${FAST_HIGHLIGHT_STYLES[${FAST_THEME_NAME}command]}"
+    assert "$reply[3]" same_as "16 19 ${FAST_HIGHLIGHT_STYLES[${FAST_THEME_NAME}here-string-tri]}"
+    # BUG?: the text spans over non-text (i.e. var) part
+    assert "$reply[4]" same_as "19 28 ${FAST_HIGHLIGHT_STYLES[${FAST_THEME_NAME}here-string-text]}"
+    assert "$reply[5]" same_as "23 28 ${FAST_HIGHLIGHT_STYLES[${FAST_THEME_NAME}here-string-var]}"
+    assert "$reply[6]" same_as ""
+}
+
 # vim:ft=zsh:sw=4:sts=4:et