diff --git a/Sources/SwiftWarningControl/SyntaxProtocol+WarningControl.swift b/Sources/SwiftWarningControl/SyntaxProtocol+WarningControl.swift
index 2b058d721a0..c3d8a4fd305 100644
--- a/Sources/SwiftWarningControl/SyntaxProtocol+WarningControl.swift
+++ b/Sources/SwiftWarningControl/SyntaxProtocol+WarningControl.swift
@@ -27,7 +27,7 @@ extension SyntaxProtocol {
   @_spi(ExperimentalLanguageFeatures)
   public func warningGroupControl(
     for diagnosticGroupIdentifier: DiagnosticGroupIdentifier,
-    globalControls: [DiagnosticGroupIdentifier: WarningGroupControl] = [:],
+    globalControls: [(DiagnosticGroupIdentifier, WarningGroupControl)] = [],
     groupInheritanceTree: DiagnosticGroupInheritanceTree? = nil
   ) -> WarningGroupControl? {
     let warningControlRegions = root.warningGroupControlRegionTreeImpl(
diff --git a/Sources/SwiftWarningControl/WarningControlDeclSyntax.swift b/Sources/SwiftWarningControl/WarningControlDeclSyntax.swift
index 6480600645a..dbc406e45f9 100644
--- a/Sources/SwiftWarningControl/WarningControlDeclSyntax.swift
+++ b/Sources/SwiftWarningControl/WarningControlDeclSyntax.swift
@@ -15,8 +15,8 @@ import SwiftSyntax
 extension WithAttributesSyntax {
   /// Compute a dictionary of all `@warn` diagnostic group behavior controls
   /// specified on this warning control declaration scope.
-  var allWarningGroupControls: [DiagnosticGroupIdentifier: WarningGroupControl] {
-    attributes.reduce(into: [DiagnosticGroupIdentifier: WarningGroupControl]()) { result, attr in
+  var allWarningGroupControls: [(DiagnosticGroupIdentifier, WarningGroupControl)] {
+    attributes.reduce(into: [(DiagnosticGroupIdentifier, WarningGroupControl)]()) { result, attr in
       // `@warn` attributes
       guard case .attribute(let attributeSyntax) = attr,
         attributeSyntax.attributeName.as(IdentifierTypeSyntax.self)?.name.text == "warn"
@@ -50,7 +50,7 @@ extension WithAttributesSyntax {
       else {
         return
       }
-      result[DiagnosticGroupIdentifier(diagnosticGroupID)] = control
+      result.append((DiagnosticGroupIdentifier(diagnosticGroupID), control))
     }
   }
 }
diff --git a/Sources/SwiftWarningControl/WarningControlRegionBuilder.swift b/Sources/SwiftWarningControl/WarningControlRegionBuilder.swift
index 285864bd2ee..fc156a262c7 100644
--- a/Sources/SwiftWarningControl/WarningControlRegionBuilder.swift
+++ b/Sources/SwiftWarningControl/WarningControlRegionBuilder.swift
@@ -16,7 +16,7 @@ import SwiftSyntax
 extension SyntaxProtocol {
   @_spi(ExperimentalLanguageFeatures)
   public func warningGroupControlRegionTree(
-    globalControls: [DiagnosticGroupIdentifier: WarningGroupControl] = [:],
+    globalControls: [(DiagnosticGroupIdentifier, WarningGroupControl)] = [],
     groupInheritanceTree: DiagnosticGroupInheritanceTree? = nil
   ) -> WarningControlRegionTree {
     return warningGroupControlRegionTreeImpl(
@@ -30,7 +30,7 @@ extension SyntaxProtocol {
   /// a specific absolute position - meant to speed up tree generation for individual
   /// queries.
   func warningGroupControlRegionTreeImpl(
-    globalControls: [DiagnosticGroupIdentifier: WarningGroupControl],
+    globalControls: [(DiagnosticGroupIdentifier, WarningGroupControl)],
     groupInheritanceTree: DiagnosticGroupInheritanceTree?,
     containing position: AbsolutePosition? = nil
   ) -> WarningControlRegionTree {
diff --git a/Sources/SwiftWarningControl/WarningControlRegions.swift b/Sources/SwiftWarningControl/WarningControlRegions.swift
index 8faf4c5901b..ce4d84b6c3d 100644
--- a/Sources/SwiftWarningControl/WarningControlRegions.swift
+++ b/Sources/SwiftWarningControl/WarningControlRegions.swift
@@ -123,7 +123,7 @@ public struct WarningControlRegionTree {
   /// Add a warning control region to the tree
   mutating func addWarningGroupControls(
     range: Range<AbsolutePosition>,
-    controls: [DiagnosticGroupIdentifier: WarningGroupControl]
+    controls: [(DiagnosticGroupIdentifier, WarningGroupControl)]
   ) {
     guard !controls.isEmpty else { return }
     let newNode = WarningControlRegionNode(range: range)
diff --git a/Tests/SwiftWarningControlTest/WarningControlTests.swift b/Tests/SwiftWarningControlTest/WarningControlTests.swift
index acf23b2012d..8afa9baf0c1 100644
--- a/Tests/SwiftWarningControlTest/WarningControlTests.swift
+++ b/Tests/SwiftWarningControlTest/WarningControlTests.swift
@@ -272,7 +272,7 @@ public class WarningGroupControlTests: XCTestCase {
         1️⃣let x = 1
       }
       """,
-      globalControls: ["GroupID": .warning],
+      globalControls: [("GroupID", .warning)],
       diagnosticGroupID: "GroupID",
       states: [
         "1️⃣": .error
@@ -289,7 +289,7 @@ public class WarningGroupControlTests: XCTestCase {
         }
       }
       """,
-      globalControls: ["GroupID": .error],
+      globalControls: [("GroupID", .error)],
       diagnosticGroupID: "GroupID",
       states: [
         "1️⃣": .error,
@@ -306,7 +306,7 @@ public class WarningGroupControlTests: XCTestCase {
         1️⃣let x = 1
       }
       """,
-      globalControls: ["GroupID": .warning],
+      globalControls: [("GroupID", .warning)],
       diagnosticGroupID: "GroupID",
       states: [
         "1️⃣": .warning
@@ -351,13 +351,49 @@ public class WarningGroupControlTests: XCTestCase {
       )
     }
   }
+
+  func testOrderedGlobalControls() throws {
+    // Parent group is ignored, followed by sub-group treated as warning
+    try assertWarningGroupControl(
+      """
+      func foo() {
+        1️⃣let x = 1
+      }
+      """,
+      globalControls: [("SuperGroupID", .ignored), ("GroupID", .warning)],
+      groupInheritanceTree: DiagnosticGroupInheritanceTree(subGroups: [
+        "SuperGroupID": ["GroupID"]
+      ]),
+      diagnosticGroupID: "GroupID",
+      states: [
+        "1️⃣": .warning
+      ]
+    )
+
+    // Parent group is treated as warning, followed by ignored sub-group
+    try assertWarningGroupControl(
+      """
+      func foo() {
+        1️⃣let x = 1
+      }
+      """,
+      globalControls: [("SuperGroupID", .warning), ("GroupID", .ignored)],
+      groupInheritanceTree: DiagnosticGroupInheritanceTree(subGroups: [
+        "SuperGroupID": ["GroupID"]
+      ]),
+      diagnosticGroupID: "GroupID",
+      states: [
+        "1️⃣": .ignored
+      ]
+    )
+  }
 }
 
 /// Assert that the various marked positions in the source code have the
 /// expected warning behavior controls.
 private func assertWarningGroupControl(
   _ markedSource: String,
-  globalControls: [DiagnosticGroupIdentifier: WarningGroupControl] = [:],
+  globalControls: [(DiagnosticGroupIdentifier, WarningGroupControl)] = [],
   groupInheritanceTree: DiagnosticGroupInheritanceTree? = nil,
   diagnosticGroupID: DiagnosticGroupIdentifier,
   states: [String: WarningGroupControl?],