diff --git a/test/unit/io/sam_file/sam_file_output_test.cpp b/test/unit/io/sam_file/sam_file_output_test.cpp
index 047e6fd0c1..e6b5e3a444 100644
--- a/test/unit/io/sam_file/sam_file_output_test.cpp
+++ b/test/unit/io/sam_file/sam_file_output_test.cpp
@@ -216,7 +216,7 @@ read1	41	ref	1	61	1S1M1D1M1I	ref	10	300	ACGT	!##$	AS:i:2	NM:i:7
 
     // We would like to test that (some of) the headers can be copied even if ref_ids_types do not match.
     // input_ref_ids_type is std::deque<std::string> by default.
-    using input_ref_ids_type = std::remove_cvref_t<decltype(input_header.ref_ids())>; 
+    using input_ref_ids_type = std::remove_cvref_t<decltype(input_header.ref_ids())>;
     using output_ref_ids_type = std::array<std::string, 0>;
     static_assert(!std::is_same_v<input_ref_ids_type, output_ref_ids_type>);