diff --git a/hall.scm b/hall.scm
index ac8a64b..b366452 100644
--- a/hall.scm
+++ b/hall.scm
@@ -30,7 +30,8 @@
                (scheme-file "internal")))))
          (tests ((directory
                    "tests"
-                   ((scheme-file "test-eastasian-locale")))))
+                   ((scheme-file "test-eastasian-locale")
+                    (scheme-file "test-uniseg")))))
          (programs
            ((directory
               "scripts"
diff --git a/tests/test-uniseg.scm b/tests/test-uniseg.scm
new file mode 100644
index 0000000..d37b1f2
--- /dev/null
+++ b/tests/test-uniseg.scm
@@ -0,0 +1,38 @@
+(define-module (tests test-uniseg)
+  #:use-module (uniseg)
+  #:use-module (srfi srfi-64))
+
+(test-begin "test-uniseg")
+
+(test-equal "linefeed"
+  'line-feed (char->grapheme-property #\x000a) )
+
+(test-equal "zerowidth joiner"
+  'zero-width-joiner (char->grapheme-property #\x200d))
+
+(test-equal "doublewidth"
+  2 (char-width #\〈))
+
+(test-equal "japanese widths"
+  36 (string-width "トランスジェンダーの権利は人権です！"))
+
+(test-equal "korean/hangul"
+  27 (string-width "트랜스젠더 권리는 인권이다!"))
+
+(test-equal "ascii"
+  30 (string-width "Trans rights are human rights!"))
+
+(test-equal "emoji"
+  33 (string-width "Trans 🏳️‍⚧️ rights are human rights!"))
+
+(test-equal "cjk tone mark"
+  0 (char-width #\x302B))
+
+;; TODO: get practical sentences, sorry to native speakers
+(test-equal "cjk with tone mark"
+  2 (string-width "⺏〫"))
+
+(test-equal "cjk tone mark property"
+  'extend (char->grapheme-property #\x302B))
+
+(test-end "test-uniseg")