diff --git a/styles/Canonical/013-Spell-out-numbers-below-10.yml b/styles/Canonical/013-Spell-out-numbers-below-10.yml
index 0a32be9..15bb26a 100644
--- a/styles/Canonical/013-Spell-out-numbers-below-10.yml
+++ b/styles/Canonical/013-Spell-out-numbers-below-10.yml
@@ -9,13 +9,13 @@ scope:
   - table.cell
 level: suggestion
 swap:
-  (?<![\-\.\,:\/*-+#]|Day )0(?![\-\.\,:\/*-+]): zero
-  (?<![\-\.\,:\/*-+#]|Day )1(?![\-\.\,:\/*-+])(?! Jan(?!uary)?| Feb(?!ruary)?| Mar(?!ch)?| Apr(?!il)?| May| Jun(?:e)?| Jul(?:y)?| Aug(?:ust)?| Sep(?:tember)?| Oct(?:ober)?| Nov(?:ember)?| Dec(?:ember)?): one
-  (?<![\-\.\,:\/*-+#]|Day )2(?![\-\.\,:\/*-+])(?! Jan(?!uary)?| Feb(?!ruary)?| Mar(?!ch)?| Apr(?!il)?| May| Jun(?:e)?| Jul(?:y)?| Aug(?:ust)?| Sep(?:tember)?| Oct(?:ober)?| Nov(?:ember)?| Dec(?:ember)?): two
-  (?<![\-\.\,:\/*-+#]|Juju )3(?![\-\.\,:\/*-+])(?! Jan(?!uary)?| Feb(?!ruary)?| Mar(?!ch)?| Apr(?!il)?| May| Jun(?:e)?| Jul(?:y)?| Aug(?:ust)?| Sep(?:tember)?| Oct(?:ober)?| Nov(?:ember)?| Dec(?:ember)?): three
-  (?<![\-\.\,:\/*-+#])4(?![\-\.\,:\/*-+])(?! Jan(?!uary)?| Feb(?!ruary)?| Mar(?!ch)?| Apr(?!il)?| May| Jun(?:e)?| Jul(?:y)?| Aug(?:ust)?| Sep(?:tember)?| Oct(?:ober)?| Nov(?:ember)?| Dec(?:ember)?): four
-  (?<![\-\.\,:\/*-+#])5(?![\-\.\,:\/*-+])(?! Jan(?!uary)?| Feb(?!ruary)?| Mar(?!ch)?| Apr(?!il)?| May| Jun(?:e)?| Jul(?:y)?| Aug(?:ust)?| Sep(?:tember)?| Oct(?:ober)?| Nov(?:ember)?| Dec(?:ember)?): five
-  (?<![\-\.\,:\/*-+#])6(?![\-\.\,:\/*-+])(?! Jan(?!uary)?| Feb(?!ruary)?| Mar(?!ch)?| Apr(?!il)?| May| Jun(?:e)?| Jul(?:y)?| Aug(?:ust)?| Sep(?:tember)?| Oct(?:ober)?| Nov(?:ember)?| Dec(?:ember)?): six
-  (?<![\-\.\,:\/*-+#])7(?![\-\.\,:\/*-+])(?! Jan(?!uary)?| Feb(?!ruary)?| Mar(?!ch)?| Apr(?!il)?| May| Jun(?:e)?| Jul(?:y)?| Aug(?:ust)?| Sep(?:tember)?| Oct(?:ober)?| Nov(?:ember)?| Dec(?:ember)?): seven
-  (?<![\-\.\,:\/*-+#])8(?![\-\.\,:\/*-+])(?! Jan(?!uary)?| Feb(?!ruary)?| Mar(?!ch)?| Apr(?!il)?| May| Jun(?:e)?| Jul(?:y)?| Aug(?:ust)?| Sep(?:tember)?| Oct(?:ober)?| Nov(?:ember)?| Dec(?:ember)?): eight
-  (?<![\-\.\,:\/*-+#])9(?![\-\.\,:\/*-+])(?! Jan(?!uary)?| Feb(?!ruary)?| Mar(?!ch)?| Apr(?!il)?| May| Jun(?:e)?| Jul(?:y)?| Aug(?:ust)?| Sep(?:tember)?| Oct(?:ober)?| Nov(?:ember)?| Dec(?:ember)?): nine
+  (?<![-+#*:,.\/]|Day )0(?![-+*:,.\/]): zero
+  (?<![-+#*:,.\/]|Day )1(?![-+*:,.\/])(?! Jan(?!uary)?| Feb(?!ruary)?| Mar(?!ch)?| Apr(?!il)?| May| Jun(?:e)?| Jul(?:y)?| Aug(?:ust)?| Sep(?:tember)?| Oct(?:ober)?| Nov(?:ember)?| Dec(?:ember)?): one
+  (?<![-+#*:,.\/]|Day )2(?![-+*:,.\/])(?! Jan(?!uary)?| Feb(?!ruary)?| Mar(?!ch)?| Apr(?!il)?| May| Jun(?:e)?| Jul(?:y)?| Aug(?:ust)?| Sep(?:tember)?| Oct(?:ober)?| Nov(?:ember)?| Dec(?:ember)?): two
+  (?<![-+#*:,.\/]|Juju )3(?![-+*:,.\/])(?! Jan(?!uary)?| Feb(?!ruary)?| Mar(?!ch)?| Apr(?!il)?| May| Jun(?:e)?| Jul(?:y)?| Aug(?:ust)?| Sep(?:tember)?| Oct(?:ober)?| Nov(?:ember)?| Dec(?:ember)?): three
+  (?<![-+#*:,.\/])4(?![-+*:,.\/])(?! Jan(?!uary)?| Feb(?!ruary)?| Mar(?!ch)?| Apr(?!il)?| May| Jun(?:e)?| Jul(?:y)?| Aug(?:ust)?| Sep(?:tember)?| Oct(?:ober)?| Nov(?:ember)?| Dec(?:ember)?): four
+  (?<![-+#*:,.\/])5(?![-+*:,.\/])(?! Jan(?!uary)?| Feb(?!ruary)?| Mar(?!ch)?| Apr(?!il)?| May| Jun(?:e)?| Jul(?:y)?| Aug(?:ust)?| Sep(?:tember)?| Oct(?:ober)?| Nov(?:ember)?| Dec(?:ember)?): five
+  (?<![-+#*:,.\/])6(?![-+*:,.\/])(?! Jan(?!uary)?| Feb(?!ruary)?| Mar(?!ch)?| Apr(?!il)?| May| Jun(?:e)?| Jul(?:y)?| Aug(?:ust)?| Sep(?:tember)?| Oct(?:ober)?| Nov(?:ember)?| Dec(?:ember)?): six
+  (?<![-+#*:,.\/])7(?![-+*:,.\/])(?! Jan(?!uary)?| Feb(?!ruary)?| Mar(?!ch)?| Apr(?!il)?| May| Jun(?:e)?| Jul(?:y)?| Aug(?:ust)?| Sep(?:tember)?| Oct(?:ober)?| Nov(?:ember)?| Dec(?:ember)?): seven
+  (?<![-+#*:,.\/])8(?![-+*:,.\/])(?! Jan(?!uary)?| Feb(?!ruary)?| Mar(?!ch)?| Apr(?!il)?| May| Jun(?:e)?| Jul(?:y)?| Aug(?:ust)?| Sep(?:tember)?| Oct(?:ober)?| Nov(?:ember)?| Dec(?:ember)?): eight
+  (?<![-+#*:,.\/])9(?![-+*:,.\/])(?! Jan(?!uary)?| Feb(?!ruary)?| Mar(?!ch)?| Apr(?!il)?| May| Jun(?:e)?| Jul(?:y)?| Aug(?:ust)?| Sep(?:tember)?| Oct(?:ober)?| Nov(?:ember)?| Dec(?:ember)?): nine
diff --git a/tests/data/manifest.yml b/tests/data/manifest.yml
index ef7abc8..c7ae63e 100644
--- a/tests/data/manifest.yml
+++ b/tests/data/manifest.yml
@@ -248,14 +248,42 @@ rules:
   #       expect:
   #         triggers:
   #         severity:
-  # 013-Spell-out-numbers-below-10:
-  #   cases:
-  #     - id: valid
-  #       filetypes: [md, rst]
-  #       content:
-  #       expect:
-  #         triggers:
-  #         severity:
+  013-Spell-out-numbers-below-10:
+    cases:
+      - id: valid
+        filetypes: [md, rst]
+        content: |
+          0 1 2 3 4 5 6 7 8 9
+        expect:
+          triggers:
+            - '0'
+            - '1'
+            - '2'
+            - '3'
+            - '4'
+            - '5'
+            - '6'
+            - '7'
+            - '8'
+            - '9'
+          severity: suggestion
+      - id: invalid
+        filetypes: [md, rst]
+        # Skip testing n*n, because two asterisks is parsed as emphasis
+        content: |
+          0-0 0+0 #0 0:0 0,0 0.0 0/0
+          1-1 1+1 #1 1:1 1,1 1.1 1/1 1 Jan
+          2-2 2+2 #2 2:2 2,2 2.2 2/2 2 Jan
+          3-3 3+3 #3 3:3 3,3 3.3 3/3 3 Jan
+          4-4 4-4 #4 4:4 4,4 4.4 4/4 4 Jan
+          5-5 5+5 #5 5:5 5,5 5.5 5/5 5 Jan
+          6-6 6+6 #6 6:6 6,6 6.6 6/6 6 Jan
+          7-7 7+7 #7 7:7 7,7 7.7 7/7 7 Jan
+          8-8 8+8 #8 8:8 8,8 8.8 8/8 8 Jan
+          9-9 9+9 #9 9:9 9,9 9.9 9/9 9 Jan
+        expect:
+          triggers: []
+          severity: suggestion
   # 014a-Numbers-greater-than-nine-should-be-in-numeric-form:
   #   cases:
   #     - id: valid