diff --git a/python/ql/lib/semmle/python/essa/Definitions.qll b/python/ql/lib/semmle/python/essa/Definitions.qll
index 752ff9da329..e4e4bba747f 100644
--- a/python/ql/lib/semmle/python/essa/Definitions.qll
+++ b/python/ql/lib/semmle/python/essa/Definitions.qll
@@ -225,9 +225,9 @@ class ModuleVariable extends SsaSourceVariable {
   }
 
   override ControlFlowNode getAnImplicitUse() {
-    result = global_variable_callnode()
+    result = this.global_variable_callnode()
     or
-    result = global_variable_import()
+    result = this.global_variable_import()
     or
     exists(ImportTimeScope scope | scope.entryEdge(result, _) |
       this = scope.getOuterVariable(_) or
diff --git a/python/ql/lib/semmle/python/essa/Essa.qll b/python/ql/lib/semmle/python/essa/Essa.qll
index d703b72242a..2d403070c4c 100644
--- a/python/ql/lib/semmle/python/essa/Essa.qll
+++ b/python/ql/lib/semmle/python/essa/Essa.qll
@@ -41,7 +41,7 @@ class EssaVariable extends TEssaDefinition {
    */
   ControlFlowNode getASourceUse() {
     exists(SsaSourceVariable var |
-      result = use_for_var(var) and
+      result = this.use_for_var(var) and
       result = var.getASourceUse()
     )
   }
@@ -258,7 +258,7 @@ class PhiFunction extends EssaDefinition, TPhiFunction {
   /** Gets another definition of the same source variable that reaches this definition. */
   private EssaDefinition reachingDefinition(BasicBlock pred) {
     result.getScope() = this.getScope() and
-    result.getSourceVariable() = pred_var(pred) and
+    result.getSourceVariable() = this.pred_var(pred) and
     result.reachesEndOfBlock(pred)
   }
 
diff --git a/python/ql/lib/semmle/python/frameworks/Django.qll b/python/ql/lib/semmle/python/frameworks/Django.qll
index 08afa55635a..89ff0537c97 100644
--- a/python/ql/lib/semmle/python/frameworks/Django.qll
+++ b/python/ql/lib/semmle/python/frameworks/Django.qll
@@ -1844,11 +1844,13 @@ private module PrivateDjango {
       t.start() and
       result.asCfgNode().(CallNode).getFunction() = this.asViewRef().asCfgNode()
       or
-      exists(DataFlow::TypeTracker t2 | result = asViewResult(t2).track(t2, t))
+      exists(DataFlow::TypeTracker t2 | result = this.asViewResult(t2).track(t2, t))
     }
 
     /** Gets a reference to the result of calling the `as_view` classmethod of this class. */
-    DataFlow::Node asViewResult() { asViewResult(DataFlow::TypeTracker::end()).flowsTo(result) }
+    DataFlow::Node asViewResult() {
+      this.asViewResult(DataFlow::TypeTracker::end()).flowsTo(result)
+    }
   }
 
   /** A class that we consider a django View class. */
@@ -1944,10 +1946,10 @@ private module PrivateDjango {
     abstract DataFlow::Node getViewArg();
 
     final override DjangoRouteHandler getARequestHandler() {
-      poorMansFunctionTracker(result) = getViewArg()
+      poorMansFunctionTracker(result) = this.getViewArg()
       or
       exists(DjangoViewClass vc |
-        getViewArg() = vc.asViewResult() and
+        this.getViewArg() = vc.asViewResult() and
         result = vc.getARequestHandler()
       )
     }
diff --git a/python/ql/lib/semmle/python/frameworks/Flask.qll b/python/ql/lib/semmle/python/frameworks/Flask.qll
index e854e07658b..3c2cc5af5ec 100644
--- a/python/ql/lib/semmle/python/frameworks/Flask.qll
+++ b/python/ql/lib/semmle/python/frameworks/Flask.qll
@@ -292,12 +292,12 @@ module Flask {
 
     override Function getARequestHandler() {
       exists(DataFlow::LocalSourceNode func_src |
-        func_src.flowsTo(getViewArg()) and
+        func_src.flowsTo(this.getViewArg()) and
         func_src.asExpr().(CallableExpr) = result.getDefinition()
       )
       or
       exists(FlaskViewClass vc |
-        getViewArg() = vc.asViewResult().getAUse() and
+        this.getViewArg() = vc.asViewResult().getAUse() and
         result = vc.getARequestHandler()
       )
     }
diff --git a/python/ql/lib/semmle/python/frameworks/Stdlib.qll b/python/ql/lib/semmle/python/frameworks/Stdlib.qll
index f89f74f3c34..0267d2a80b9 100644
--- a/python/ql/lib/semmle/python/frameworks/Stdlib.qll
+++ b/python/ql/lib/semmle/python/frameworks/Stdlib.qll
@@ -397,8 +397,8 @@ private module StdlibPrivate {
       result = this.get_executable_arg()
       or
       exists(DataFlow::Node arg_args, boolean shell |
-        arg_args = get_args_arg() and
-        shell = get_shell_arg_value()
+        arg_args = this.get_args_arg() and
+        shell = this.get_shell_arg_value()
       |
         // When "executable" argument is set, and "shell" argument is `False`, the
         // "args" argument will only be used to set the program name and arguments to