diff --git a/src/csv/write-csv.cc b/src/csv/write-csv.cc
index 186947c..ce86b83 100644
--- a/src/csv/write-csv.cc
+++ b/src/csv/write-csv.cc
@@ -8,8 +8,12 @@ namespace kraken::csv {
 
 void write_csv(std::ostream& output, csv_type const& csv) {
     for (const auto& line : csv) {
-        std::ranges::copy(line,
-                          std::ostream_iterator<std::string>{output, ","});
+        bool first = true;
+        for (const auto& atom : line) {
+            output << (first ? "" : ",") << atom;
+            first = false;
+        };
+        output << '\n';
     }
 }
 
diff --git a/tests/unit/csv.cc b/tests/unit/csv.cc
index 2135081..093430a 100644
--- a/tests/unit/csv.cc
+++ b/tests/unit/csv.cc
@@ -48,7 +48,7 @@ TEST(write_csv, empty) {
     ASSERT_EQ(output.str(), expected);
 }
 
-TEST(write_csv, DISABLED_single_line) {
+TEST(write_csv, single_line) {
     auto const csv = csv_type{
         {"a", "b", "c"},
     };
@@ -58,7 +58,7 @@ TEST(write_csv, DISABLED_single_line) {
     ASSERT_EQ(output.str(), expected);
 }
 
-TEST(write_csv, DISABLED_multiple_lines) {
+TEST(write_csv, multiple_lines) {
     auto const csv = csv_type{
         {"a", "b", "c"},
         {"1", "2", "3"},