diff --git a/list-of-macros.md b/list-of-macros.md
index 56e32b80..1bab0cc6 100644
--- a/list-of-macros.md
+++ b/list-of-macros.md
@@ -23,6 +23,7 @@ Please note that not everything has to be declared.
 [hyperref](#package-hyperref),
 [inputenc](#package-inputenc),
 [listings](#package-listings),
+[mathtools](#package-mathtools),
 [pgfplots](#package-pgfplots),
 [tikz](#package-tikz),
 [xcolor](#package-xcolor),
@@ -311,6 +312,20 @@ We simply remove the listings, inserting a paragraph break.
 lstlisting
 
 
+## Package mathtools
+
+Source: [yalafi/packages/mathtools.py](yalafi/packages/mathtools.py),
+tests: [tests/test\_packages/test\_mathtools.py](tests/test_packages/test_mathtools.py)
+
+**Loaded packages**
+
+[amsmath](#package-amsmath)
+
+**Macros**
+
+\\mathtoolsset
+
+
 ## Package pgfplots
 
 Source: [yalafi/packages/pgfplots.py](yalafi/packages/pgfplots.py),
diff --git a/tests/test_packages/test_mathtools.py b/tests/test_packages/test_mathtools.py
new file mode 100644
index 00000000..0bdb8dbe
--- /dev/null
+++ b/tests/test_packages/test_mathtools.py
@@ -0,0 +1,25 @@
+
+
+import pytest
+from yalafi import parameters, parser, utils
+
+preamble = '\\usepackage{mathtools}\n'
+
+def get_plain(latex):
+    parms = parameters.Parameters()
+    p = parser.Parser(parms)
+    plain, nums = utils.get_txt_pos(p.parse(preamble + latex))
+    assert len(plain) == len(nums)
+    return plain
+
+
+data_test_macros_latex = [
+
+    (r'\mathtoolsset{showonlyrefs,mathic = true}', ''),
+
+]
+
+@pytest.mark.parametrize('latex,plain_expected', data_test_macros_latex)
+def test_macros_latex(latex, plain_expected):
+    plain = get_plain(latex)
+    assert plain == plain_expected
diff --git a/yalafi/packages/mathtools.py b/yalafi/packages/mathtools.py
new file mode 100644
index 00000000..4fb479ec
--- /dev/null
+++ b/yalafi/packages/mathtools.py
@@ -0,0 +1,25 @@
+
+#
+#   YaLafi module for LaTeX package mathtools
+#
+
+from yalafi.defs import InitModule
+
+require_packages = ["amsmath"]
+
+
+def init_module(parser, options):
+    parms = parser.parms
+
+    macros_latex = r"""
+
+        \newcommand{\mathtoolsset}[1]{}
+
+    """
+
+    macros_python = []
+
+    environments = []
+
+    return InitModule(macros_latex=macros_latex, macros_python=macros_python,
+                      environments=environments)