diff --git a/ql/src/codeql_ruby/controlflow/internal/ControlFlowGraphImpl.qll b/ql/src/codeql_ruby/controlflow/internal/ControlFlowGraphImpl.qll
index 77664806c7c..4cb35175592 100644
--- a/ql/src/codeql_ruby/controlflow/internal/ControlFlowGraphImpl.qll
+++ b/ql/src/codeql_ruby/controlflow/internal/ControlFlowGraphImpl.qll
@@ -555,6 +555,10 @@ module Trees {
     }
   }
 
+  private class CallTree extends StandardPostOrderTree, Call {
+    override ControlFlowTree getChildNode(int i) { result = this.getArgument(i) }
+  }
+
   private class CaseTree extends PreOrderTree, CaseExpr {
     final override predicate propagatesAbnormal(AstNode child) {
       child = this.getValue() or child = this.getABranch()
@@ -913,7 +917,7 @@ module Trees {
     }
   }
 
-  private class MethodCallTree extends StandardPostOrderTree, MethodCall {
+  private class MethodCallTree extends CallTree, MethodCall {
     final override ControlFlowTree getChildNode(int i) {
       result = this.getReceiver() and i = 0
       or
@@ -1222,10 +1226,6 @@ module Trees {
     final override ControlFlowTree getChildNode(int i) { result = this.getComponent(i) }
   }
 
-  private class SuperCallTree extends StandardPostOrderTree, SuperCall {
-    final override ControlFlowTree getChildNode(int i) { result = this.getArgument(i) }
-  }
-
   private class ToplevelTree extends BodyStmtTree, Toplevel {
     final override AstNode getBodyChild(int i, boolean rescuable) {
       result = this.getBeginBlock(i) and rescuable = true
@@ -1292,10 +1292,6 @@ module Trees {
       )
     }
   }
-
-  private class YieldCallTree extends StandardPostOrderTree, YieldCall {
-    final override ControlFlowTree getChildNode(int i) { result = this.getArgument(i) }
-  }
 }
 
 private Scope parent(Scope n) {