diff --git a/Lib/test/cmath_testcases.txt b/Lib/test/mathdata/cmath_testcases.txt
similarity index 100%
rename from Lib/test/cmath_testcases.txt
rename to Lib/test/mathdata/cmath_testcases.txt
diff --git a/Lib/test/floating_points.txt b/Lib/test/mathdata/floating_points.txt
similarity index 100%
rename from Lib/test/floating_points.txt
rename to Lib/test/mathdata/floating_points.txt
diff --git a/Lib/test/formatfloat_testcases.txt b/Lib/test/mathdata/formatfloat_testcases.txt
similarity index 100%
rename from Lib/test/formatfloat_testcases.txt
rename to Lib/test/mathdata/formatfloat_testcases.txt
diff --git a/Lib/test/ieee754.txt b/Lib/test/mathdata/ieee754.txt
similarity index 100%
rename from Lib/test/ieee754.txt
rename to Lib/test/mathdata/ieee754.txt
diff --git a/Lib/test/math_testcases.txt b/Lib/test/mathdata/math_testcases.txt
similarity index 100%
rename from Lib/test/math_testcases.txt
rename to Lib/test/mathdata/math_testcases.txt
diff --git a/Lib/test/test_float.py b/Lib/test/test_float.py
index c4ee1e08251d63..98e11919430a10 100644
--- a/Lib/test/test_float.py
+++ b/Lib/test/test_float.py
@@ -25,7 +25,7 @@
 
 #locate file with float format test values
 test_dir = os.path.dirname(__file__) or os.curdir
-format_testfile = os.path.join(test_dir, 'formatfloat_testcases.txt')
+format_testfile = os.path.join(test_dir, 'mathdata', 'formatfloat_testcases.txt')
 
 class FloatSubclass(float):
     pass
@@ -763,6 +763,7 @@ def test_issue35560(self):
 class ReprTestCase(unittest.TestCase):
     def test_repr(self):
         with open(os.path.join(os.path.split(__file__)[0],
+                  'mathdata',
                   'floating_points.txt'), encoding="utf-8") as floats_file:
             for line in floats_file:
                 line = line.strip()
diff --git a/Lib/test/test_math.py b/Lib/test/test_math.py
index b71d08b1124497..d5d2197c36b254 100644
--- a/Lib/test/test_math.py
+++ b/Lib/test/test_math.py
@@ -33,8 +33,8 @@
 else:
     file = __file__
 test_dir = os.path.dirname(file) or os.curdir
-math_testcases = os.path.join(test_dir, 'math_testcases.txt')
-test_file = os.path.join(test_dir, 'cmath_testcases.txt')
+math_testcases = os.path.join(test_dir, 'mathdata', 'math_testcases.txt')
+test_file = os.path.join(test_dir, 'mathdata', 'cmath_testcases.txt')
 
 
 def to_ulps(x):
@@ -2559,7 +2559,7 @@ def test_fractions(self):
 
 def load_tests(loader, tests, pattern):
     from doctest import DocFileSuite
-    tests.addTest(DocFileSuite("ieee754.txt"))
+    tests.addTest(DocFileSuite(os.path.join("mathdata", "ieee754.txt")))
     return tests
 
 if __name__ == '__main__':
diff --git a/Makefile.pre.in b/Makefile.pre.in
index 35f254508579bf..a9d54b0e364b72 100644
--- a/Makefile.pre.in
+++ b/Makefile.pre.in
@@ -2151,6 +2151,7 @@ TESTSUBDIRS=	idlelib/idle_test \
 		test/encoded_modules \
 		test/leakers \
 		test/libregrtest \
+		test/mathdata \
 		test/subprocessdata \
 		test/support \
 		test/support/_hypothesis_stubs \