diff --git a/Sources/ProjectSpec/Scheme.swift b/Sources/ProjectSpec/Scheme.swift
index db6aca73..fc9074e4 100644
--- a/Sources/ProjectSpec/Scheme.swift
+++ b/Sources/ProjectSpec/Scheme.swift
@@ -218,6 +218,7 @@ 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 {
             
@@ -284,7 +285,8 @@ 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
@@ -302,6 +304,7 @@ public struct Scheme: Equatable {
             self.customLLDBInit = customLLDBInit
             self.captureScreenshotsAutomatically = captureScreenshotsAutomatically
             self.deleteScreenshotsWhenEachTestSucceeds = deleteScreenshotsWhenEachTestSucceeds
+            self.macroExpansion = macroExpansion
         }
 
         public var shouldUseLaunchSchemeArgsEnv: Bool {
@@ -616,6 +619,7 @@ 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 1f2a0810..2dc862a5 100644
--- a/Sources/XcodeGenKit/SchemeGenerator.swift
+++ b/Sources/XcodeGenKit/SchemeGenerator.swift
@@ -227,6 +227,10 @@ public class SchemeGenerator {
 
         let buildableReference = buildActionEntries.first(where: { $0.buildableReference.blueprintName == schemeTarget?.name })?.buildableReference ?? buildActionEntries.first!.buildableReference
         let runnables = makeProductRunnables(for: schemeTarget, buildableReference: buildableReference)
+        
+        let testMacroExpansion: XCScheme.BuildableReference = buildActionEntries.first(
+            where: { $0.buildableReference.blueprintName == scheme.test?.macroExpansion }
+        )?.buildableReference ?? buildableReference
 
         let buildAction = XCScheme.BuildAction(
             buildActionEntries: buildActionEntries,
@@ -284,7 +288,7 @@ public class SchemeGenerator {
 
         let testAction = XCScheme.TestAction(
             buildConfiguration: scheme.test?.config ?? defaultDebugConfig.name,
-            macroExpansion: buildableReference,
+            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 b5f392d3..aa85d3d4 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"
             }