diff --git a/src/sas/qtgui/Calculators/DensityPanel.py b/src/sas/qtgui/Calculators/DensityPanel.py
index 04622e02b3..608ed840b7 100644
--- a/src/sas/qtgui/Calculators/DensityPanel.py
+++ b/src/sas/qtgui/Calculators/DensityPanel.py
@@ -56,7 +56,7 @@ def setupUi(self):
 
         self.setFixedSize(self.minimumSizeHint())
 
-        rx = QtCore.QRegularExpression("[+\-]?(?:0|[1-9]\d*)(?:\.\d*)?(?:[eE][+\-]?\d+)?")
+        rx = QtCore.QRegularExpression(r"[+\-]?(?:0|[1-9]\d*)(?:\.\d*)?(?:[eE][+\-]?\d+)?")
         self.ui.editMolarVolume.setValidator(QtGui.QRegularExpressionValidator(rx, self.ui.editMolarVolume))
         self.ui.editMassDensity.setValidator(QtGui.QRegularExpressionValidator(rx, self.ui.editMassDensity))
 
diff --git a/src/sas/qtgui/Calculators/KiessigPanel.py b/src/sas/qtgui/Calculators/KiessigPanel.py
index fe00be1205..a9013498ef 100644
--- a/src/sas/qtgui/Calculators/KiessigPanel.py
+++ b/src/sas/qtgui/Calculators/KiessigPanel.py
@@ -19,7 +19,7 @@ def __init__(self, parent=None):
         self.manager = parent
         self.thickness = KiessigThicknessCalculator()
 
-        rx = QtCore.QRegularExpression("[+\-]?(?:0|[1-9]\d*)(?:\.\d*)?(?:[eE][+\-]?\d+)?")
+        rx = QtCore.QRegularExpression(r"[+\-]?(?:0|[1-9]\d*)(?:\.\d*)?(?:[eE][+\-]?\d+)?")
         self.deltaq_in.setValidator(QtGui.QRegularExpressionValidator(rx, self.deltaq_in))
 
         # signals
diff --git a/src/sas/qtgui/Calculators/ResolutionCalculatorPanel.py b/src/sas/qtgui/Calculators/ResolutionCalculatorPanel.py
index 89eacafd30..5df24ba9fd 100644
--- a/src/sas/qtgui/Calculators/ResolutionCalculatorPanel.py
+++ b/src/sas/qtgui/Calculators/ResolutionCalculatorPanel.py
@@ -128,7 +128,7 @@ def checkWavelength(self):
             text_edit.setStyleSheet(BG_WHITE)
             input_string = str(text_edit.text())
             if self.cbWaveColor.currentText() != 'TOF':
-                input_wavelength = re.match('\d+\.?\d*', input_string)
+                input_wavelength = re.match(r'\d+\.?\d*', input_string)
                 if input_wavelength is None:
                     text_edit.setStyleSheet(BG_RED)
                     self.cmdCompute.setEnabled(False)
@@ -137,7 +137,7 @@ def checkWavelength(self):
                     text_edit.setStyleSheet(BG_WHITE)
                     self.cmdCompute.setEnabled(True)
             else:
-                interval_wavelength = re.match('^\d+\.?\d*\s*-\s*\d+\.?\d*$',
+                interval_wavelength = re.match(r'^\d+\.?\d*\s*-\s*\d+\.?\d*$',
                                                input_string)
 
                 if interval_wavelength is None:
@@ -148,7 +148,7 @@ def checkWavelength(self):
                 else:
                     # check on min < max
                     [wavelength_min, wavelength_max] = \
-                        re.findall('\d+\.?\d*', interval_wavelength.group())
+                        re.findall(r'\d+\.?\d*', interval_wavelength.group())
 
                     if float(wavelength_min) >= float(wavelength_max):
                         text_edit.setStyleSheet(BG_RED)
@@ -167,7 +167,7 @@ def checkWavelengthSpread(self):
         if text_edit.isModified():
             text_edit.setStyleSheet(BG_WHITE)
             if self.cbWaveColor.currentText() != 'TOF':
-                pattern = '^\d+\.?\d*(|;\s*\d+)$'
+                pattern = r'^\d+\.?\d*(|;\s*\d+)$'
                 input_string = str(text_edit.text())
                 wavelength_spread_input = re.match(pattern, input_string)
 
@@ -183,7 +183,7 @@ def checkWavelengthSpread(self):
                     text_edit.setStyleSheet(BG_WHITE)
                     self.cmdCompute.setEnabled(True)
             else:
-                pattern = '^\d+\.?\d*\s*-\s*\d+\.?\d*(|;\s*\d+)$'
+                pattern = r'^\d+\.?\d*\s*-\s*\d+\.?\d*(|;\s*\d+)$'
                 input_string = str(text_edit.text())
                 wavelength_spread_input = re.match(pattern, input_string)
 
@@ -208,7 +208,7 @@ def checkPixels(self):
 
         if text_edit.isModified():
             text_edit.setStyleSheet(BG_WHITE)
-            pattern = '^\d+\.?\d*,\s*\d+\.?\d*$'
+            pattern = r'^\d+\.?\d*,\s*\d+\.?\d*$'
             input_string = str(text_edit.text())
             pixels_input = re.match(pattern, input_string)
 
@@ -226,7 +226,7 @@ def checkQx_y(self):
         """ Validator for qx and qy inputs """
         Q_modified = [self.txtQx.isModified(), self.txtQy.isModified()]
         if any(Q_modified):
-            pattern = '^-?\d+\.?\d*(,\s*-?\d+\.?\d*)*$'
+            pattern = r'^-?\d+\.?\d*(,\s*-?\d+\.?\d*)*$'
             text_edit = self.txtQx if Q_modified[0] else self.txtQy
             input_string = str(text_edit.text())
             q_input = re.match(pattern, input_string)
@@ -265,7 +265,7 @@ def checkAperture(self):
         if text_edit.isModified():
             text_edit.setStyleSheet(BG_WHITE)
             input_string = str(text_edit.text())
-            pattern = '^\d+\.?\d*(|,\s*\d+)$'
+            pattern = r'^\d+\.?\d*(|,\s*\d+)$'
             aperture_input = re.match(pattern, input_string)
 
             if aperture_input is None:
diff --git a/src/sas/qtgui/Calculators/SldPanel.py b/src/sas/qtgui/Calculators/SldPanel.py
index 5ddf6ad931..e1de5f430a 100644
--- a/src/sas/qtgui/Calculators/SldPanel.py
+++ b/src/sas/qtgui/Calculators/SldPanel.py
@@ -119,7 +119,7 @@ def setupUi(self):
         # Chemical formula is checked via periodictable.formula module.
         self.ui.editMolecularFormula.setValidator(GuiUtils.FormulaValidator(self.ui.editMolecularFormula))
 
-        rx = QtCore.QRegularExpression("[+\-]?(?:0|[1-9]\d*)(?:\.\d*)?(?:[eE][+\-]?\d+)?")
+        rx = QtCore.QRegularExpression(r"[+\-]?(?:0|[1-9]\d*)(?:\.\d*)?(?:[eE][+\-]?\d+)?")
         self.ui.editMassDensity.setValidator(QtGui.QRegularExpressionValidator(rx, self.ui.editMassDensity))
         self.ui.editNeutronWavelength.setValidator(QtGui.QRegularExpressionValidator(rx, self.ui.editNeutronWavelength))
         self.ui.editXrayWavelength.setValidator(QtGui.QRegularExpressionValidator(rx, self.ui.editXrayWavelength))
diff --git a/src/sas/qtgui/MainWindow/DataManager.py b/src/sas/qtgui/MainWindow/DataManager.py
index 94753ddcaf..a6a8a10ae8 100755
--- a/src/sas/qtgui/MainWindow/DataManager.py
+++ b/src/sas/qtgui/MainWindow/DataManager.py
@@ -145,7 +145,7 @@ def rename(self, name):
             return ""
 
         # Explicitly match [0-9]+ at the end of the name
-        result = re.split("\[[0-9]+\]$", name)
+        result = re.split(r"\[[0-9]+\]$", name)
         base_name = result[0].strip()
 
         # data_name_dict: {'baseName': [0, 1, .. n]}
@@ -278,7 +278,7 @@ def remove_item_from_data_name_dict(self, name):
         Remove 'name' or 'name [n]' from data_name_dict
         """
         # Split on whitespace - split 'name [n]' into list of len() == 2
-        data_name_split = re.split("\[[0-9]+\]$", name)
+        data_name_split = re.split(r"\[[0-9]+\]$", name)
         base_name = data_name_split[0].strip()
         if name in self.data_name_dict:
             self.data_name_dict[name].remove(0)
diff --git a/src/sas/qtgui/Perspectives/Corfunc/ExtractionCanvas.py b/src/sas/qtgui/Perspectives/Corfunc/ExtractionCanvas.py
index 3e16465161..6028727632 100644
--- a/src/sas/qtgui/Perspectives/Corfunc/ExtractionCanvas.py
+++ b/src/sas/qtgui/Perspectives/Corfunc/ExtractionCanvas.py
@@ -34,7 +34,7 @@ def draw_data(self):
         self.axes = self.fig.add_subplot(111)
         self.axes.set_xscale("linear")
         self.axes.set_yscale("linear")
-        self.axes.set_xlabel("Z [$\AA$]")
+        self.axes.set_xlabel(r"Z [$\AA$]")
         self.axes.set_ylabel("Correlation")
         self.axes.set_title("Real Space Correlations")
         self.fig.tight_layout()
diff --git a/src/sas/qtgui/Perspectives/Corfunc/IDFCanvas.py b/src/sas/qtgui/Perspectives/Corfunc/IDFCanvas.py
index c5e99c619f..9d816b2c83 100644
--- a/src/sas/qtgui/Perspectives/Corfunc/IDFCanvas.py
+++ b/src/sas/qtgui/Perspectives/Corfunc/IDFCanvas.py
@@ -19,7 +19,7 @@ def draw_data(self):
         self.axes = self.fig.add_subplot(111)
         self.axes.set_xscale("linear")
         self.axes.set_yscale("linear")
-        self.axes.set_xlabel("Z [$\AA$]")
+        self.axes.set_xlabel(r"Z [$\AA$]")
         self.axes.set_ylabel("IDF")
         self.axes.set_title("Interface Distribution Function")
         self.fig.tight_layout()
diff --git a/src/sas/qtgui/Perspectives/Corfunc/QSpaceCanvas.py b/src/sas/qtgui/Perspectives/Corfunc/QSpaceCanvas.py
index afdb371a87..ea7828d779 100644
--- a/src/sas/qtgui/Perspectives/Corfunc/QSpaceCanvas.py
+++ b/src/sas/qtgui/Perspectives/Corfunc/QSpaceCanvas.py
@@ -73,7 +73,7 @@ def draw_data(self):
         self.axes = self.fig.add_subplot(111)
         self.axes.set_xscale("log")
         self.axes.set_yscale("log")
-        self.axes.set_xlabel("Q [$\AA^{-1}$]")
+        self.axes.set_xlabel(r"Q [$\AA^{-1}$]")
         self.axes.set_ylabel("I(Q) [cm$^{-1}$]")
         self.axes.set_title("Scattering data")
         self.fig.tight_layout()
diff --git a/src/sas/qtgui/Perspectives/Corfunc/RealSpaceCanvas.py b/src/sas/qtgui/Perspectives/Corfunc/RealSpaceCanvas.py
index 52fa4f7b1e..638c3d1af3 100644
--- a/src/sas/qtgui/Perspectives/Corfunc/RealSpaceCanvas.py
+++ b/src/sas/qtgui/Perspectives/Corfunc/RealSpaceCanvas.py
@@ -25,15 +25,15 @@ def draw_data(self):
         self.axes = self.fig.add_subplot(111)
         self.axes.set_xscale("linear")
         self.axes.set_yscale("linear")
-        self.axes.set_xlabel("Z [$\AA$]")
+        self.axes.set_xlabel(r"Z [$\AA$]")
         self.axes.set_ylabel("Correlation")
         self.axes.set_title("Real Space Correlations")
         self.fig.tight_layout()
 
         if self.data is not None and len(self.data) == 2:
             data1, data3 = self.data[0], self.data[1]
-            self.axes.plot(data1.x, data1.y, label="$\Gamma_1(z)$")
-            self.axes.plot(data3.x, data3.y, label="$\Gamma_3(z)$")
+            self.axes.plot(data1.x, data1.y, label=r"$\Gamma_1(z)$")
+            self.axes.plot(data3.x, data3.y, label=r"$\Gamma_3(z)$")
 
             self.axes.set_xlim(0, max(data1.x) / 4)
             self.legend = self.axes.legend()
diff --git a/src/sas/qtgui/Perspectives/Fitting/FittingUtilities.py b/src/sas/qtgui/Perspectives/Fitting/FittingUtilities.py
index fcee175c81..9516938716 100644
--- a/src/sas/qtgui/Perspectives/Fitting/FittingUtilities.py
+++ b/src/sas/qtgui/Perspectives/Fitting/FittingUtilities.py
@@ -638,7 +638,7 @@ def plotPolydispersities(model):
         xunit = model.details[name][0]
         data1d.xtransform = 'x'
         data1d.ytransform = 'y'
-        data1d.xaxis(r'\rm{{{}}}'.format(name.replace('_', '\_')), xunit)
+        data1d.xaxis(r'\rm{{{}}}'.format(name.replace('_', r'\_')), xunit)
         data1d.yaxis(r'\rm{probability}', 'normalized')
         data1d.scale = 'linear'
         data1d.symbol = 'Line'
diff --git a/src/sas/qtgui/Perspectives/Fitting/FittingWidget.py b/src/sas/qtgui/Perspectives/Fitting/FittingWidget.py
index a18088347e..0f9ac91ef0 100644
--- a/src/sas/qtgui/Perspectives/Fitting/FittingWidget.py
+++ b/src/sas/qtgui/Perspectives/Fitting/FittingWidget.py
@@ -3905,9 +3905,9 @@ def onShowSLDProfile(self):
         profile_data.symbol = 'Line'
         profile_data.hide_error = True
         profile_data._xaxis = "R"
-        profile_data._xunit = "\AA"
+        profile_data._xunit = r"\AA"
         profile_data._yaxis = "SLD"
-        profile_data._yunit = "10^{-6}\AA^{-2}"
+        profile_data._yunit = r"10^{-6}\AA^{-2}"
         profile_data.ytransform='y'
         profile_data.xtransform='x'
 
diff --git a/src/sas/qtgui/Perspectives/Inversion/InversionLogic.py b/src/sas/qtgui/Perspectives/Inversion/InversionLogic.py
index 6640feacdc..d18d9cd206 100644
--- a/src/sas/qtgui/Perspectives/Inversion/InversionLogic.py
+++ b/src/sas/qtgui/Perspectives/Inversion/InversionLogic.py
@@ -136,7 +136,7 @@ def newPRPlot(self, out, pr, cov=None):
         return new_plot
 
     def add_errors(self, sigma=0.05):
-        """
+        r"""
         Adds errors to data set is they are not available.
         Uses  $\Delta y = \sigma | y |$.
         """
diff --git a/src/sas/qtgui/Perspectives/ParticleEditor/syntax_highlight.py b/src/sas/qtgui/Perspectives/ParticleEditor/syntax_highlight.py
index 84e15f3b46..361b9a1fc2 100644
--- a/src/sas/qtgui/Perspectives/ParticleEditor/syntax_highlight.py
+++ b/src/sas/qtgui/Perspectives/ParticleEditor/syntax_highlight.py
@@ -73,16 +73,16 @@ class PythonHighlighter(QSyntaxHighlighter):
         # Comparison
         '==', '!=', '<', '<=', '>', '>=',
         # Arithmetic
-        '\+', '-', '\*', '/', '//', '\%', '\*\*',
+        r'\+', '-', r'\*', '/', '//', r'\%', r'\*\*',
         # In-place
-        '\+=', '-=', '\*=', '/=', '\%=',
+        r'\+=', '-=', r'\*=', '/=', r'\%=',
         # Bitwise
-        '\^', '\|', '\&', '\~', '>>', '<<',
+        r'\^', r'\|', r'\&', r'\~', '>>', '<<',
     ]
 
     # Python braces
     braces = [
-        '\{', '\}', '\(', '\)', '\[', '\]',
+        r'\{', r'\}', r'\(', r'\)', r'\[', r'\]',
     ]
 
     def __init__(self, document):
diff --git a/src/sas/qtgui/Plotting/Slicers/AnnulusSlicer.py b/src/sas/qtgui/Plotting/Slicers/AnnulusSlicer.py
index 6e2c1f07b0..8a3007ccab 100644
--- a/src/sas/qtgui/Plotting/Slicers/AnnulusSlicer.py
+++ b/src/sas/qtgui/Plotting/Slicers/AnnulusSlicer.py
@@ -131,12 +131,12 @@ def _post_data(self, nbins=None):
         new_plot.interactive = True
         new_plot.detector = self.data.detector
         # If the data file does not tell us what the axes are, just assume...
-        new_plot.xaxis("\\rm{\phi}", 'degrees')
-        new_plot.yaxis("\\rm{Intensity} ", "cm^{-1}")
+        new_plot.xaxis(r"\rm{\phi}", 'degrees')
+        new_plot.yaxis(r"\rm{Intensity} ", "cm^{-1}")
         if hasattr(data, "scale") and data.scale == 'linear' and \
                 self.data.name.count("Residuals") > 0:
             new_plot.ytransform = 'y'
-            new_plot.yaxis("\\rm{Residuals} ", "/")
+            new_plot.yaxis(r"\rm{Residuals} ", "/")
 
         new_plot.id = "AnnulusPhi" + self.data.name
         new_plot.type_id = "Slicer" + self.data.name # Used to remove plots after changing slicer so they don't keep showing up after closed
diff --git a/src/sas/qtgui/Plotting/Slicers/WedgeSlicer.py b/src/sas/qtgui/Plotting/Slicers/WedgeSlicer.py
index 6f75c6f850..d4abde4240 100644
--- a/src/sas/qtgui/Plotting/Slicers/WedgeSlicer.py
+++ b/src/sas/qtgui/Plotting/Slicers/WedgeSlicer.py
@@ -204,12 +204,12 @@ def _post_data(self, new_sector=None, nbins=None):
         if self.averager.__name__ == 'SectorPhi':
             # angular plots usually require a linear x scale and better with
             # a linear y scale as well.
-            new_plot.xaxis("\\rm{\phi}", "degrees")
+            new_plot.xaxis(r"\rm{\phi}", "degrees")
             new_plot.xtransform = 'x'
             new_plot.ytransform = 'y'
         else:
-            new_plot.xaxis("\\rm{Q}", 'A^{-1}')
-        new_plot.yaxis("\\rm{Intensity} ", "cm^{-1}")
+            new_plot.xaxis(r"\rm{Q}", 'A^{-1}')
+        new_plot.yaxis(r"\rm{Intensity} ", "cm^{-1}")
 
         new_plot.id = str(self.averager.__name__) + self.data.name
         new_plot.type_id = "Slicer" + self.data.name # Used to remove plots after changing slicer so they don't keep showing up after closed
diff --git a/src/sas/qtgui/Utilities/PythonSyntax.py b/src/sas/qtgui/Utilities/PythonSyntax.py
index b863d4d993..4bdd1cb3f7 100644
--- a/src/sas/qtgui/Utilities/PythonSyntax.py
+++ b/src/sas/qtgui/Utilities/PythonSyntax.py
@@ -62,16 +62,16 @@ class PythonHighlighter (QSyntaxHighlighter):
         # Comparison
         '==', '!=', '<', '<=', '>', '>=',
         # Arithmetic
-        '\+', '-', '\*', '/', '//', '\%', '\*\*',
+        r'\+', '-', r'\*', '/', '//', r'\%', r'\*\*',
         # In-place
-        '\+=', '-=', '\*=', '/=', '\%=',
+        r'\+=', '-=', r'\*=', '/=', r'\%=',
         # Bitwise
-        '\^', '\|', '\&', '\~', '>>', '<<',
+        r'\^', r'\|', r'\&', r'\~', '>>', '<<',
     ]
 
     # Python braces
     braces = [
-        '\{', '\}', '\(', '\)', '\[', '\]',
+        r'\{', r'\}', r'\(', r'\)', r'\[', r'\]',
     ]
     def __init__(self, document, is_python=True):
         QSyntaxHighlighter.__init__(self, document)
@@ -209,4 +209,4 @@ def match_multiline(self, text, delimiter, in_state, style):
     infile = open('PythonSyntax.py', 'r')
     editor.setPlainText(infile.read())
 
-    app.exec_()
\ No newline at end of file
+    app.exec_()
diff --git a/src/sas/qtgui/Utilities/UnitTesting/GuiUtilsTest.py b/src/sas/qtgui/Utilities/UnitTesting/GuiUtilsTest.py
index ca649cb915..53b4b51b14 100644
--- a/src/sas/qtgui/Utilities/UnitTesting/GuiUtilsTest.py
+++ b/src/sas/qtgui/Utilities/UnitTesting/GuiUtilsTest.py
@@ -515,11 +515,11 @@ def testrstToHtml(self):
 
         s = ".. |Ang| unicode:: U+212B"
         assert rstToHtml(s) == ('Ang', 'Å')
-        s = ".. |Ang^-1| replace:: |Ang|\ :sup:`-1`"
+        s = r".. |Ang^-1| replace:: |Ang|\ :sup:`-1`"
         assert rstToHtml(s) == ('Ang^-1', 'Å<sup>-1</sup>')
-        s = ".. |1e-6Ang^-2| replace:: 10\ :sup:`-6`\ |Ang|\ :sup:`-2`"
+        s = r".. |1e-6Ang^-2| replace:: 10\ :sup:`-6`\ |Ang|\ :sup:`-2`"
         assert rstToHtml(s) == ('1e-6Ang^-2', '10<sup>-6</sup> Å<sup>-2</sup>')
-        s = ".. |cm^-1| replace:: cm\ :sup:`-1`"
+        s = r".. |cm^-1| replace:: cm\ :sup:`-1`"
         assert rstToHtml(s) == ('cm^-1', 'cm<sup>-1</sup>')
         s = ".. |deg| unicode:: U+00B0"
         assert rstToHtml(s) == ('deg', '°')
@@ -532,7 +532,7 @@ def testrstToHtml(self):
     def testConvertUnitToHTML(self):
         ''' test unit string replacement'''
         s = None
-        assert convertUnitToHTML(s) is ""
+        assert convertUnitToHTML(s) == ""
 
         s = ""
         assert convertUnitToHTML(s) == s
diff --git a/src/sas/sascalc/calculator/geni.py b/src/sas/sascalc/calculator/geni.py
index b1b9e15d21..3cdb43bce7 100644
--- a/src/sas/sascalc/calculator/geni.py
+++ b/src/sas/sascalc/calculator/geni.py
@@ -148,7 +148,7 @@ def _calc_Iqxy(scale, x, y, qx, qy):
         Iq = [abs(np.sum(scale*np.exp(1j*(qx_k*x + qy_k*y))))**2
               for qx_k, qy_k in zip(qx.flat, qy.flat)]
         return np.asarray(Iq).reshape(qx.shape)
-_calc_Iqxy.__doc__ = """
+_calc_Iqxy.__doc__ = r"""
     Compute I(q) for a set of points (x, y).
     
     Uses: I(q) = \|sum V(r) rho(r) e^(1j q.r)\|^2 / sum V(r)
@@ -176,7 +176,7 @@ def _calc_Iqxy_elements(sld, x, y, z, elements, vol, qx, qy):
 def _calc_Iqxy_magnetic(
         qx, qy, x, y, rho, vol, rho_m,
         up_frac_i=1, up_frac_f=1, up_theta=0., up_phi=0.):
-    """Compute I(q) for a set of points (x, y), with magnetism on each point.
+    r"""Compute I(q) for a set of points (x, y), with magnetism on each point.
 
     Uses: I(q) = sum_xs w_xs \|sum V(r) rho(q, r, xs) e^(1j q.r)\|^2 / sum V(r)
     where rho is adjusted for the particular q and polarization cross section.
diff --git a/src/sas/sascalc/invariant/invariant.py b/src/sas/sascalc/invariant/invariant.py
index e3feecdecb..6c5e7ac65b 100644
--- a/src/sas/sascalc/invariant/invariant.py
+++ b/src/sas/sascalc/invariant/invariant.py
@@ -204,7 +204,7 @@ def __init__(self, scale=1, power=4):
         self.dpower = 0.0
 
     def linearize_q_value(self, value):
-        """
+        r"""
         Transform the input q-value for linearization
 
         :param value: q-value