diff --git a/azure-pipelines.yml b/azure-pipelines.yml
index 5f9dda5c1a1dfdeed67dce3a6adbae133e832a08..586bd867144218339bed96b5b8f761d7ab3d9524 100644
--- a/azure-pipelines.yml
+++ b/azure-pipelines.yml
@@ -51,7 +51,7 @@ jobs:
         script: |
             set -e
             curl -L -O -k https://gitlab.tiker.net/inducer/ci-support/raw/master/prepare-and-run-flake8.sh
-            . ./prepare-and-run-flake8.sh pytools test
+            . ./prepare-and-run-flake8.sh pymbolic test
 
         displayName: 'Flake8'
 
@@ -78,3 +78,11 @@ jobs:
             . ./prepare-and-run-pylint.sh pymbolic test/test_*.py
 
         displayName: 'Pylint'
+
+schedules:
+-
+    cron: "0 0 * * 0"
+    displayName: Weekly build
+    branches:
+        include:
+        - master
diff --git a/pymbolic/algorithm.py b/pymbolic/algorithm.py
index 357fe9b917ebadda221adc7fe0a8c030e4449cec..027aea2636fb834b07818f26d5c286aa0ccac304 100644
--- a/pymbolic/algorithm.py
+++ b/pymbolic/algorithm.py
@@ -84,7 +84,7 @@ def extended_euclidean(q, r):
         quot, t = divmod(q, r)
         T = Q[0] - quot*R[0], Q[1] - quot*R[1]  # noqa
         q, r = r, t
-        Q, R = R, T
+        Q, R = R, T  # noqa: N806
 
     return q, Q[0], Q[1]
 
@@ -150,7 +150,7 @@ def fft(x, sign=1, wrap_intermediate=lambda x: x):
     if n == 1:
         return x
 
-    N1, N2 = find_factors(n)
+    N1, N2 = find_factors(n)  # noqa: N806
 
     sub_ffts = [
             wrap_intermediate(
diff --git a/pymbolic/interop/symengine.py b/pymbolic/interop/symengine.py
index c0d1c06892bc7e870b131357f04754599fab103e..46034243ff7c2914810da2be5dbf692ca7fc482f 100644
--- a/pymbolic/interop/symengine.py
+++ b/pymbolic/interop/symengine.py
@@ -57,7 +57,7 @@ class SymEngineToPymbolicMapper(SympyLikeToPymbolicMapper):
     def map_Constant(self, expr):  # noqa
         return self.rec(expr.n())
 
-    map_Complex = map_Constant
+    map_Complex = map_Constant  # noqa: N815
 
     def map_ComplexDouble(self, expr):  # noqa
         r = self.rec(expr.real_part())
@@ -67,7 +67,7 @@ class SymEngineToPymbolicMapper(SympyLikeToPymbolicMapper):
         else:
             return r + 1j * i
 
-    map_RealDouble = SympyLikeToPymbolicMapper.to_float
+    map_RealDouble = SympyLikeToPymbolicMapper.to_float  # noqa: N815
 
     def function_name(self, expr):
         try:
diff --git a/pymbolic/interop/sympy.py b/pymbolic/interop/sympy.py
index 86f50dc66929c658fc4de1569d7c4c10f2319bc4..38a99cc323ec9cf04cd3361387c4a23f930d21a3 100644
--- a/pymbolic/interop/sympy.py
+++ b/pymbolic/interop/sympy.py
@@ -52,9 +52,9 @@ class SympyToPymbolicMapper(SympyLikeToPymbolicMapper):
     def map_ImaginaryUnit(self, expr):  # noqa
         return 1j
 
-    map_Float = SympyLikeToPymbolicMapper.to_float
+    map_Float = SympyLikeToPymbolicMapper.to_float  # noqa: N815
 
-    map_NumberSymbol = SympyLikeToPymbolicMapper.to_float
+    map_NumberSymbol = SympyLikeToPymbolicMapper.to_float  # noqa: N815
 
     def function_name(self, expr):
         return type(expr).__name__
@@ -84,12 +84,12 @@ class SympyToPymbolicMapper(SympyLikeToPymbolicMapper):
         right = self.rec(expr.args[1])
         return prim.Comparison(left, operator, right)
 
-    map_Equality = partial(_comparison_operator, operator="==")
-    map_Unequality = partial(_comparison_operator, operator="!=")
-    map_GreaterThan = partial(_comparison_operator, operator=">=")
-    map_LessThan = partial(_comparison_operator, operator="<=")
-    map_StrictGreaterThan = partial(_comparison_operator, operator=">")
-    map_StrictLessThan = partial(_comparison_operator, operator="<")
+    map_Equality = partial(_comparison_operator, operator="==")  # noqa: N815
+    map_Unequality = partial(_comparison_operator, operator="!=")  # noqa: N815
+    map_GreaterThan = partial(_comparison_operator, operator=">=")  # noqa: N815
+    map_LessThan = partial(_comparison_operator, operator="<=")  # noqa: N815
+    map_StrictGreaterThan = partial(_comparison_operator, operator=">")  # noqa: N815
+    map_StrictLessThan = partial(_comparison_operator, operator="<")  # noqa: N815
 
 # }}}