diff --git a/unit_tests/logicdata.cpp b/unit_tests/logicdata.cpp
index c76299a119..cd7b5f629e 100644
--- a/unit_tests/logicdata.cpp
+++ b/unit_tests/logicdata.cpp
@@ -486,9 +486,9 @@ static void writeFooter() {
 	writeTimingMarker();
 }
 
-void writeFile(CompositeEvent *events, int count) {
+void writeFile(const char * fileName, CompositeEvent *events, int count) {
 
-	ptr = fopen("test.logicdata", "wb");
+	ptr = fopen(fileName, "wb");
 
 	writeHeader();
 	writeEvents(events, count);
diff --git a/unit_tests/logicdata.h b/unit_tests/logicdata.h
index cff6f83b79..249877487d 100644
--- a/unit_tests/logicdata.h
+++ b/unit_tests/logicdata.h
@@ -17,4 +17,4 @@ struct CompositeEvent {
     bool injector;
 };
 
-void writeFile(CompositeEvent *events, int count);
+void writeFile(const char * fileName, CompositeEvent *events, int count);
diff --git a/unit_tests/logicdata_sandbox.cpp b/unit_tests/logicdata_sandbox.cpp
index e56c98b713..02e303b564 100644
--- a/unit_tests/logicdata_sandbox.cpp
+++ b/unit_tests/logicdata_sandbox.cpp
@@ -27,7 +27,7 @@ void runLogicdataSandbox() {
     setEvent(events, index++, 1000030, false, false, false, false, true, false);
     setEvent(events, index++, 2000030, false, false, true, false, false, true);
 
-	writeFile(events, index);
+	writeFile("test.logicdata", events, index);
 
 	printf("Done!\n");
 }