diff --git a/fix-fp-issue.patch b/fix-fp-issue.patch
new file mode 100644
index 0000000..4bd8d84
--- /dev/null
+++ b/fix-fp-issue.patch
@@ -0,0 +1,26 @@
+Subject: Fix floating point precission issue in tests
+Author: Antonio Larrosa <alarrosa@suse.com>
+
+Depending on the computer where the tests run, the result of
+estimateQuadraticCurveLength((0, 0), (50, 20), (100, 40))
+can be
+107.70329614269009
+or
+107.70329614269008
+so it's better to ignore the final digit
+
+Index: antonio/obs/home/alarrosa/branches/devel/languages/python/fonts/python-fontPens/fontPens-0.2.4/Lib/fontPens/penTools.py
+===================================================================
+--- fontPens-0.2.4/Lib/fontPens/penTools.py
++++ fontPens-0.2.4.new/Lib/fontPens/penTools.py
+@@ -160,8 +160,8 @@ def estimateQuadraticCurveLength(pt0, pt
+     0.0
+     >>> estimateQuadraticCurveLength((0, 0), (50, 0), (80, 0)) # collinear points
+     80.0
+-    >>> estimateQuadraticCurveLength((0, 0), (50, 20), (100, 40)) # collinear points
+-    107.70329614269009
++    >>> int(10000000000000 * estimateQuadraticCurveLength((0, 0), (50, 20), (100, 40))) # collinear points
++    1077032961426900
+     >>> estimateQuadraticCurveLength((0, 0), (0, 100), (100, 0))
+     153.6861437729263
+     >>> estimateQuadraticCurveLength((0, 0), (50, -10), (80, 50))
diff --git a/python-fontPens.changes b/python-fontPens.changes
index e523b6a..5ad7eac 100644
--- a/python-fontPens.changes
+++ b/python-fontPens.changes
@@ -1,3 +1,10 @@
+-------------------------------------------------------------------
+Fri Jun 12 11:47:01 UTC 2020 - Antonio Larrosa <alarrosa@suse.com>
+
+- Add patch to fix floating point precission issue that made tests
+  fail depending on where the package is built
+  * fix-fp-issue.patch
+
 -------------------------------------------------------------------
 Wed May 20 10:25:48 UTC 2020 - Antonio Larrosa <alarrosa@suse.com>
 
diff --git a/python-fontPens.spec b/python-fontPens.spec
index 74168ed..3e7b6cf 100644
--- a/python-fontPens.spec
+++ b/python-fontPens.spec
@@ -24,6 +24,7 @@ Summary:        A collection of classes implementing the pen protocol for manipu
 License:        BSD-3-Clause
 URL:            https://github.com/robofab-developers/fontPens
 Source:         https://files.pythonhosted.org/packages/source/f/fontPens/fontPens-%{version}.zip
+Patch0:         fix-fp-issue.patch
 BuildRequires:  %{python_module setuptools}
 BuildRequires:  fdupes
 BuildRequires:  python-rpm-macros
@@ -42,6 +43,7 @@ A collection of classes implementing the pen protocol for manipulating glyphs.
 
 %prep
 %setup -q -n fontPens-%{version}
+%patch0 -p1
 
 %build
 %python_build