diff --git a/Docs/ProjectSpec.md b/Docs/ProjectSpec.md
index 430e54e4..fa5f7fe0 100644
--- a/Docs/ProjectSpec.md
+++ b/Docs/ProjectSpec.md
@@ -1039,7 +1039,7 @@ The different actions share some properties:
 - [ ] **askForAppToLaunch**: **Bool** - `run` and `profile` actions can define the executable set to ask to launch. This defaults to false.
 - [ ] **launchAutomaticallySubstyle**: **String** - `run` action can define the launch automatically substyle ('2' for extensions).
 - [ ] **storeKitConfiguration**: **String** - `run` action can specify a storekit configuration. See [Options](#options).
-- [ ] **macroExpansion**: **String** - `run` action can define the macro expansion from other target. This defaults to nil.
+- [ ] **macroExpansion**: **String** - `run` and `test` action can define the macro expansion from other target. This defaults to nil.
 
 ### Execution Action
 
diff --git a/Sources/ProjectSpec/Scheme.swift b/Sources/ProjectSpec/Scheme.swift
index bb0a4bb9..6e2faea2 100644
--- a/Sources/ProjectSpec/Scheme.swift
+++ b/Sources/ProjectSpec/Scheme.swift
@@ -220,6 +220,7 @@ public struct Scheme: Equatable {
         public var captureScreenshotsAutomatically: Bool
         public var deleteScreenshotsWhenEachTestSucceeds: Bool
         public var testPlans: [TestPlan]
+        public var macroExpansion: String?
 
         public struct TestTarget: Equatable, ExpressibleByStringLiteral {
             
@@ -286,7 +287,8 @@ public struct Scheme: Equatable {
             debugEnabled: Bool = debugEnabledDefault,
             customLLDBInit: String? = nil,
             captureScreenshotsAutomatically: Bool = captureScreenshotsAutomaticallyDefault,
-            deleteScreenshotsWhenEachTestSucceeds: Bool = deleteScreenshotsWhenEachTestSucceedsDefault
+            deleteScreenshotsWhenEachTestSucceeds: Bool = deleteScreenshotsWhenEachTestSucceedsDefault,
+            macroExpansion: String? = nil
         ) {
             self.config = config
             self.gatherCoverageData = gatherCoverageData
@@ -304,6 +306,7 @@ public struct Scheme: Equatable {
             self.customLLDBInit = customLLDBInit
             self.captureScreenshotsAutomatically = captureScreenshotsAutomatically
             self.deleteScreenshotsWhenEachTestSucceeds = deleteScreenshotsWhenEachTestSucceeds
+            self.macroExpansion = macroExpansion
         }
 
         public var shouldUseLaunchSchemeArgsEnv: Bool {
@@ -620,6 +623,7 @@ extension Scheme.Test: JSONObjectConvertible {
         customLLDBInit = jsonDictionary.json(atKeyPath: "customLLDBInit")
         captureScreenshotsAutomatically = jsonDictionary.json(atKeyPath: "captureScreenshotsAutomatically") ?? Scheme.Test.captureScreenshotsAutomaticallyDefault
         deleteScreenshotsWhenEachTestSucceeds = jsonDictionary.json(atKeyPath: "deleteScreenshotsWhenEachTestSucceeds") ?? Scheme.Test.deleteScreenshotsWhenEachTestSucceedsDefault
+        macroExpansion = jsonDictionary.json(atKeyPath: "macroExpansion")
     }
 }
 
diff --git a/Sources/XcodeGenKit/SchemeGenerator.swift b/Sources/XcodeGenKit/SchemeGenerator.swift
index db3114d8..ac100e89 100644
--- a/Sources/XcodeGenKit/SchemeGenerator.swift
+++ b/Sources/XcodeGenKit/SchemeGenerator.swift
@@ -289,9 +289,18 @@ public class SchemeGenerator {
         let testBuildableEntries = buildActionEntries.filter({ $0.buildFor.contains(.testing) }) + testBuildTargetEntries
         let testMacroExpansionBuildableRef = testBuildableEntries.map(\.buildableReference).contains(buildableReference) ? buildableReference : testBuildableEntries.first?.buildableReference
 
+        let testMacroExpansion: XCScheme.BuildableReference = buildActionEntries.first(
+            where: { value in
+                if let macroExpansion = scheme.test?.macroExpansion {
+                    return value.buildableReference.blueprintName == macroExpansion
+                }
+                return false
+            }
+        )?.buildableReference ?? testMacroExpansionBuildableRef ?? buildableReference
+
         let testAction = XCScheme.TestAction(
             buildConfiguration: scheme.test?.config ?? defaultDebugConfig.name,
-            macroExpansion: testMacroExpansionBuildableRef,
+            macroExpansion: testMacroExpansion,
             testables: testables,
             testPlans: testPlans.isEmpty ? nil : testPlans,
             preActions: scheme.test?.preActions.map(getExecutionAction) ?? [],
diff --git a/Tests/XcodeGenKitTests/SchemeGeneratorTests.swift b/Tests/XcodeGenKitTests/SchemeGeneratorTests.swift
index 31af6747..07f63a92 100644
--- a/Tests/XcodeGenKitTests/SchemeGeneratorTests.swift
+++ b/Tests/XcodeGenKitTests/SchemeGeneratorTests.swift
@@ -476,6 +476,41 @@ class SchemeGeneratorTests: XCTestCase {
                 let xcodeProject = try project.generateXcodeProject()
 
                 let xcscheme = try unwrap(xcodeProject.sharedData?.schemes.first)
+                try expect(xcscheme.testAction?.macroExpansion?.buildableName) == "MyApp.app"
+                try expect(xcscheme.launchAction?.macroExpansion?.buildableName) == "MyApp.app"
+            }
+
+            $0.it("allows to override test macroExpansion") {
+                let app = Target(
+                    name: "MyApp",
+                    type: .application,
+                    platform: .iOS,
+                    dependencies: [Dependency(type: .target, reference: "MyAppExtension", embed: false)]
+                )
+
+                let `extension` = Target(
+                    name: "MyAppExtension",
+                    type: .appExtension,
+                    platform: .iOS
+                )
+                let appTarget = Scheme.BuildTarget(target: .local(app.name), buildTypes: [.running])
+                let extensionTarget = Scheme.BuildTarget(target: .local(`extension`.name), buildTypes: [.running])
+            
+                let scheme = Scheme(
+                    name: "TestScheme",
+                    build: Scheme.Build(targets: [appTarget, extensionTarget]),
+                    run: Scheme.Run(config: "Debug", macroExpansion: "MyApp"),
+                    test: .init(macroExpansion: "MyAppExtension")
+                )
+                let project = Project(
+                    name: "test",
+                    targets: [app, `extension`],
+                    schemes: [scheme]
+                )
+                let xcodeProject = try project.generateXcodeProject()
+
+                let xcscheme = try unwrap(xcodeProject.sharedData?.schemes.first)
+                try expect(xcscheme.testAction?.macroExpansion?.buildableName) == "MyAppExtension.appex"
                 try expect(xcscheme.launchAction?.macroExpansion?.buildableName) == "MyApp.app"
             }