diff --git a/unittest.cpp b/unittest.cpp
index 42f6aa9..824566b 100644
--- a/unittest.cpp
+++ b/unittest.cpp
@@ -1,4 +1,4 @@
-	#define DOCTEST_CONFIG_NO_MULTITHREADING
+#define DOCTEST_CONFIG_NO_MULTITHREADING
 #define DOCTEST_CONFIG_IMPLEMENT_WITH_MAIN
 #include "doctest.h"
 #include "histogram_internal.h"
@@ -43,3 +43,9 @@ TEST_CASE("positive and negative numbers")
     CHECK(min == -3);
     CHECK(max == 5);
 }
+TEST_CASE("empty vector") {
+    double min = 0;
+    double max = 0;
+    CHECK(!find_minmax({}, min, max));
+}
+