diff --git a/.test-py3.yml b/.test-py3.yml
index 03bac4972e1226544a33f51f62766204a4582e91..c0919c3dd82cd73e510bc5d97776aa8699ad0a7a 100644
--- a/.test-py3.yml
+++ b/.test-py3.yml
@@ -6,7 +6,7 @@ channels:
 dependencies:
  - conda-forge::numpy
  - conda-forge::sympy
- - python=3.5
+ - python=3.7
  - symengine::python-symengine=0.3.0
 # - pexpect
 # - maxima
diff --git a/pymbolic/imperative/utils.py b/pymbolic/imperative/utils.py
index 39d0d138257610acf0ad18e17af8c38f9807e84c..70a2813852c3e9d59caaa717fa3b41af9a3dfbda 100644
--- a/pymbolic/imperative/utils.py
+++ b/pymbolic/imperative/utils.py
@@ -124,9 +124,9 @@ def get_dot_dependency_graph(
             lines.append("%s -> %s" % (stmt_2, stmt_1))
 
     for (stmt_1, stmt_2), annot in six.iteritems(annotation_dep_graph):
-            lines.append(
-                    "%s -> %s  [label=\"%s\",style=\"dashed\"]"
-                    % (stmt_2, stmt_1, annot))
+        lines.append(
+                "%s -> %s  [label=\"%s\",style=\"dashed\"]"
+                % (stmt_2, stmt_1, annot))
 
     lines.extend(additional_lines_hook())
 
diff --git a/pymbolic/mapper/dependency.py b/pymbolic/mapper/dependency.py
index dc10d9e03a1625987de744340208ff4fa5a77355..1a041b17de3ba96e221a43b3b6ce8619b7a2932f 100644
--- a/pymbolic/mapper/dependency.py
+++ b/pymbolic/mapper/dependency.py
@@ -66,8 +66,8 @@ class DependencyMapper(CSECachingMapperMixin, Collector):
 
     def map_call(self, expr):
         if self.include_calls == "descend_args":
-                return self.combine(
-                        [self.rec(child) for child in expr.parameters])
+            return self.combine(
+                    [self.rec(child) for child in expr.parameters])
         elif self.include_calls:
             return set([expr])
         else:
@@ -75,10 +75,10 @@ class DependencyMapper(CSECachingMapperMixin, Collector):
 
     def map_call_with_kwargs(self, expr):
         if self.include_calls == "descend_args":
-                return self.combine(
-                        [self.rec(child) for child in expr.parameters]
-                        + [self.rec(val) for name, val in expr.kw_parameters.items()]
-                        )
+            return self.combine(
+                    [self.rec(child) for child in expr.parameters]
+                    + [self.rec(val) for name, val in expr.kw_parameters.items()]
+                    )
         elif self.include_calls:
             return set([expr])
         else: