diff --git a/tests/test_tools.py b/tests/test_tools.py
new file mode 100644
index 00000000..bd79fb69
--- /dev/null
+++ b/tests/test_tools.py
@@ -0,0 +1,84 @@
+# -*- coding: utf-8 -*-
+"""novelWriter Tools Tester
+"""
+
+import pytest
+
+from nw.core.tools import countWords, numberToRoman, numberToWord
+
+@pytest.mark.core
+def testCountWords():
+    testText = (
+        "# Heading One\n"
+        "## Heading Two\n"
+        "### Heading Three\n"
+        "#### Heading Four\n"
+        "\n"
+        "@tag: value\n"
+        "\n"
+        "% A comment that should n ot be counted.\n"
+        "\n"
+        "The first paragraph.\n"
+        "\n"
+        "The second paragraph.\n"
+        "\n"
+        "\n"
+        "The third paragraph.\n"
+    )
+    cC, wC, pC = countWords(testText)
+
+    assert cC == 108
+    assert wC == 17
+    assert pC == 3
+
+@pytest.mark.core
+def testNumberWords():
+    assert numberToWord(0, "en") == "Zero"
+    assert numberToWord(1, "en") == "One"
+    assert numberToWord(2, "en") == "Two"
+    assert numberToWord(3, "en") == "Three"
+    assert numberToWord(4, "en") == "Four"
+    assert numberToWord(5, "en") == "Five"
+    assert numberToWord(6, "en") == "Six"
+    assert numberToWord(7, "en") == "Seven"
+    assert numberToWord(8, "en") == "Eight"
+    assert numberToWord(9, "en") == "Nine"
+    assert numberToWord(10, "en") == "Ten"
+    assert numberToWord(11, "en") == "Eleven"
+    assert numberToWord(12, "en") == "Twelve"
+    assert numberToWord(13, "en") == "Thirteen"
+    assert numberToWord(14, "en") == "Fourteen"
+    assert numberToWord(15, "en") == "Fifteen"
+    assert numberToWord(16, "en") == "Sixteen"
+    assert numberToWord(17, "en") == "Seventeen"
+    assert numberToWord(18, "en") == "Eighteen"
+    assert numberToWord(19, "en") == "Nineteen"
+    assert numberToWord(20, "en") == "Twenty"
+    assert numberToWord(21, "en") == "Twenty-One"
+    assert numberToWord(29, "en") == "Twenty-Nine"
+    assert numberToWord(42, "en") == "Forty-Two"
+    assert numberToWord(142, "en") == "One Hundred Forty-Two"
+    assert numberToWord(999, "en") == "Nine Hundred Ninety-Nine"
+
+@pytest.mark.core
+def testRomanNumbers():
+    assert numberToRoman(None, False) == "NAN"
+    assert numberToRoman(0, False) == "OOR"
+    assert numberToRoman(1, False) == "I"
+    assert numberToRoman(2, False) == "II"
+    assert numberToRoman(3, False) == "III"
+    assert numberToRoman(4, False) == "IV"
+    assert numberToRoman(5, False) == "V"
+    assert numberToRoman(6, False) == "VI"
+    assert numberToRoman(7, False) == "VII"
+    assert numberToRoman(8, False) == "VIII"
+    assert numberToRoman(9, False) == "IX"
+    assert numberToRoman(10, False) == "X"
+    assert numberToRoman(14, False) == "XIV"
+    assert numberToRoman(42, False) == "XLII"
+    assert numberToRoman(99, False) == "XCIX"
+    assert numberToRoman(142, False) == "CXLII"
+    assert numberToRoman(542, False) == "DXLII"
+    assert numberToRoman(999, False) == "CMXCIX"
+    assert numberToRoman(2010, False) == "MMX"
+    assert numberToRoman(999, True) == "cmxcix"