diff --git a/doc/versionHistory.rst b/doc/versionHistory.rst
index b7c3560c..f676183d 100644
--- a/doc/versionHistory.rst
+++ b/doc/versionHistory.rst
@@ -6,6 +6,14 @@
 Version History
 ##################
 
+.. _lsst.ts.wep-1.5.6:
+
+-------------
+1.5.6
+-------------
+
+* Reformat code with `black`.
+
 .. _lsst.ts.wep-1.5.5:
 
 -------------
diff --git a/python/lsst/ts/wep/CreatePhosimDonutTemplates.py b/python/lsst/ts/wep/CreatePhosimDonutTemplates.py
index 762c153f..0d06ca71 100644
--- a/python/lsst/ts/wep/CreatePhosimDonutTemplates.py
+++ b/python/lsst/ts/wep/CreatePhosimDonutTemplates.py
@@ -233,12 +233,7 @@ def cutOutIntraExtraTemplates(self, templateWidth, intraVisitId, extraVisitId):
             Visit Id of the extrafocal images from Phosim.
         """
 
-        postIsrDir = os.path.join(
-            self.repoDir,
-            "rerun",
-            "run1",
-            "postISRCCD",
-        )
+        postIsrDir = os.path.join(self.repoDir, "rerun", "run1", "postISRCCD",)
         expIds = os.listdir(postIsrDir)
 
         intraSuffix = str(intraVisitId)[-5:]
diff --git a/python/lsst/ts/wep/DonutDetector.py b/python/lsst/ts/wep/DonutDetector.py
index 4eb27424..ed562571 100644
--- a/python/lsst/ts/wep/DonutDetector.py
+++ b/python/lsst/ts/wep/DonutDetector.py
@@ -23,7 +23,6 @@
 import pandas as pd
 from copy import copy
 
-
 from lsst.ts.wep.Utility import CentroidFindType
 from lsst.ts.wep.cwfs.CentroidFindFactory import CentroidFindFactory
 from scipy.spatial.distance import cdist
diff --git a/tests/cwfs/test_donutTemplatePhosim.py b/tests/cwfs/test_donutTemplatePhosim.py
index 4eefb058..92fc45ed 100644
--- a/tests/cwfs/test_donutTemplatePhosim.py
+++ b/tests/cwfs/test_donutTemplatePhosim.py
@@ -57,11 +57,11 @@ def setUp(self):
         # raft so it will not overwrite existing templates in the folder.
         shutil.copyfile(
             os.path.join(testDataPath, extraTemplateName),
-            os.path.join(self.defaultTemplatePath, "extra_template-R99_S99.txt")
+            os.path.join(self.defaultTemplatePath, "extra_template-R99_S99.txt"),
         )
         shutil.copyfile(
             os.path.join(testDataPath, intraTemplateName),
-            os.path.join(self.defaultTemplatePath, "intra_template-R99_S99.txt")
+            os.path.join(self.defaultTemplatePath, "intra_template-R99_S99.txt"),
         )
 
     def tearDown(self):
diff --git a/tests/cwfs/test_tool.py b/tests/cwfs/test_tool.py
index 0b9577b5..eb10292c 100644
--- a/tests/cwfs/test_tool.py
+++ b/tests/cwfs/test_tool.py
@@ -227,7 +227,7 @@ def testZernikeMaskFit(self):
 
         # mask data
         cut = -0.9
-        r = np.sqrt(self.xx**2 + self.yy**2)
+        r = np.sqrt(self.xx ** 2 + self.yy ** 2)
         idx = (r > 1) | (r < e) | (self.xx < cut)
 
         xx = self.xx[:].copy()
@@ -238,7 +238,7 @@ def testZernikeMaskFit(self):
 
         zr = ZernikeMaskedFit(surface, xx, yy, nc, mask, e)
 
-        self.assertLess(np.sum(np.abs(zr - self.zerCoef[0:nc])**2), 1e-10)
+        self.assertLess(np.sum(np.abs(zr - self.zerCoef[0:nc]) ** 2), 1e-10)
 
     def testPadArray(self):
 
diff --git a/tests/test_createPhosimDonutTemplates.py b/tests/test_createPhosimDonutTemplates.py
index 757af16f..de856d12 100644
--- a/tests/test_createPhosimDonutTemplates.py
+++ b/tests/test_createPhosimDonutTemplates.py
@@ -156,12 +156,7 @@ def testRunISR(self):
         # Run the ISR
         self.createPhosimDonuts.runISR()
         isrPath = os.path.join(
-            "input",
-            "rerun",
-            "run1",
-            "postISRCCD",
-            "4021123106001-g",
-            "R22",
+            "input", "rerun", "run1", "postISRCCD", "4021123106001-g", "R22",
         )
         self.assertTrue(
             os.path.exists(
@@ -183,10 +178,7 @@ def testCutOutTemplatesAndSave(self):
         self._copyPhosimFiles()
 
         self.createPhosimDonuts.cutOutTemplatesAndSave(
-            testPhosimPath,
-            240,
-            DefocalType.Extra,
-            9006001,
+            testPhosimPath, 240, DefocalType.Extra, 9006001,
         )
 
         newTemplate = np.genfromtxt(
diff --git a/tests/test_wepControllerMonolithicEimg.py b/tests/test_wepControllerMonolithicEimg.py
index 413c75be..75482377 100644
--- a/tests/test_wepControllerMonolithicEimg.py
+++ b/tests/test_wepControllerMonolithicEimg.py
@@ -38,7 +38,7 @@
     FilterType,
     CamType,
     BscDbType,
-    getConfigDir
+    getConfigDir,
 )