diff --git a/Sources/XcodeGenKit/SchemeGenerator.swift b/Sources/XcodeGenKit/SchemeGenerator.swift
index e379e799..db3114d8 100644
--- a/Sources/XcodeGenKit/SchemeGenerator.swift
+++ b/Sources/XcodeGenKit/SchemeGenerator.swift
@@ -286,10 +286,12 @@ public class SchemeGenerator {
         let testPlans = scheme.test?.testPlans.enumerated().map { index, testPlan in
              XCScheme.TestPlanReference(reference: "container:\(testPlan.path)", default: defaultTestPlanIndex == index)
         } ?? []
+        let testBuildableEntries = buildActionEntries.filter({ $0.buildFor.contains(.testing) }) + testBuildTargetEntries
+        let testMacroExpansionBuildableRef = testBuildableEntries.map(\.buildableReference).contains(buildableReference) ? buildableReference : testBuildableEntries.first?.buildableReference
 
         let testAction = XCScheme.TestAction(
             buildConfiguration: scheme.test?.config ?? defaultDebugConfig.name,
-            macroExpansion: buildableReference,
+            macroExpansion: testMacroExpansionBuildableRef,
             testables: testables,
             testPlans: testPlans.isEmpty ? nil : testPlans,
             preActions: scheme.test?.preActions.map(getExecutionAction) ?? [],