diff --git a/builtin/bisect.c b/builtin/bisect.c
index 453a6cccd7..c8aa92b19d 100644
--- a/builtin/bisect.c
+++ b/builtin/bisect.c
@@ -583,7 +583,7 @@ static int prepare_revs(struct bisect_terms *terms, struct rev_info *revs)
 	refs_for_each_glob_ref_in(get_main_ref_store(the_repository),
 				  add_bisect_ref, good, "refs/bisect/", &cb);
 	if (prepare_revision_walk(revs))
-		res = error(_("revision walk setup failed\n"));
+		res = error(_("revision walk setup failed"));
 
 	free(good);
 	free(bad);
@@ -1108,7 +1108,7 @@ static enum bisect_error bisect_skip(struct bisect_terms *terms, int argc,
 			setup_revisions(2, argv + i - 1, &revs, NULL);
 
 			if (prepare_revision_walk(&revs))
-				die(_("revision walk setup failed\n"));
+				die(_("revision walk setup failed"));
 			while ((commit = get_revision(&revs)) != NULL)
 				strvec_push(&argv_state,
 						oid_to_hex(&commit->object.oid));
diff --git a/builtin/fetch.c b/builtin/fetch.c
index b2b5aee5bf..55f97134aa 100644
--- a/builtin/fetch.c
+++ b/builtin/fetch.c
@@ -1161,7 +1161,7 @@ static int store_updated_refs(struct display_state *display_state,
 		opt.exclude_hidden_refs_section = "fetch";
 		rm = ref_map;
 		if (check_connected(iterate_ref_map, &rm, &opt)) {
-			rc = error(_("%s did not send all necessary objects\n"),
+			rc = error(_("%s did not send all necessary objects"),
 				   display_state->url);
 			goto abort;
 		}
@@ -1458,7 +1458,7 @@ static void set_option(struct transport *transport, const char *name, const char
 		die(_("option \"%s\" value \"%s\" is not valid for %s"),
 		    name, value, transport->url);
 	if (r > 0)
-		warning(_("option \"%s\" is ignored for %s\n"),
+		warning(_("option \"%s\" is ignored for %s"),
 			name, transport->url);
 }
 
diff --git a/builtin/stash.c b/builtin/stash.c
index fcfd97972a..be842258d0 100644
--- a/builtin/stash.c
+++ b/builtin/stash.c
@@ -484,7 +484,7 @@ static void unstage_changes_unless_new(struct object_id *orig_tree)
 					 "         to make room.\n"),
 				       ce->name, new_path.buf);
 				if (rename(ce->name, new_path.buf))
-					die("Failed to move %s to %s\n",
+					die("Failed to move %s to %s",
 					    ce->name, new_path.buf);
 				strbuf_release(&new_path);
 			}
diff --git a/builtin/submodule--helper.c b/builtin/submodule--helper.c
index 85fb23dee8..a46ffd49b3 100644
--- a/builtin/submodule--helper.c
+++ b/builtin/submodule--helper.c
@@ -917,7 +917,7 @@ static void generate_submodule_summary(struct summary_cb *info,
 		} else {
 			/* for a submodule removal (mode:0000000), don't warn */
 			if (p->mod_dst)
-				warning(_("unexpected mode %o\n"), p->mod_dst);
+				warning(_("unexpected mode %o"), p->mod_dst);
 		}
 	}
 
diff --git a/fetch-pack.c b/fetch-pack.c
index 58b4581ad8..983c560785 100644
--- a/fetch-pack.c
+++ b/fetch-pack.c
@@ -1614,7 +1614,7 @@ static void receive_packfile_uris(struct packet_reader *reader,
 	while (packet_reader_read(reader) == PACKET_READ_NORMAL) {
 		if (reader->pktlen < the_hash_algo->hexsz ||
 		    reader->line[the_hash_algo->hexsz] != ' ')
-			die("expected '<hash> <uri>', got: %s\n", reader->line);
+			die("expected '<hash> <uri>', got: %s", reader->line);
 
 		string_list_append(uris, reader->line);
 	}
diff --git a/loose.c b/loose.c
index a8bf772172..6d6a41b7e5 100644
--- a/loose.c
+++ b/loose.c
@@ -162,7 +162,7 @@ int repo_write_loose_object_map(struct repository *repo)
 errout:
 	rollback_lock_file(&lock);
 	strbuf_release(&buf);
-	error_errno(_("failed to write loose object index %s\n"), path.buf);
+	error_errno(_("failed to write loose object index %s"), path.buf);
 	strbuf_release(&path);
 	return -1;
 }
@@ -197,7 +197,7 @@ static int write_one_object(struct repository *repo, const struct object_id *oid
 	strbuf_release(&path);
 	return 0;
 errout:
-	error_errno(_("failed to write loose object index %s\n"), path.buf);
+	error_errno(_("failed to write loose object index %s"), path.buf);
 	close(fd);
 	rollback_lock_file(&lock);
 	strbuf_release(&buf);
diff --git a/negotiator/skipping.c b/negotiator/skipping.c
index f65d47858b..6e61b3c5f1 100644
--- a/negotiator/skipping.c
+++ b/negotiator/skipping.c
@@ -239,7 +239,7 @@ static int ack(struct fetch_negotiator *n, struct commit *c)
 {
 	int known_to_be_common = !!(c->object.flags & COMMON);
 	if (!(c->object.flags & SEEN))
-		die("received ack for commit %s not sent as 'have'\n",
+		die("received ack for commit %s not sent as 'have'",
 		    oid_to_hex(&c->object.oid));
 	mark_common(n->data, c);
 	return known_to_be_common;
diff --git a/send-pack.c b/send-pack.c
index 9666b2c995..5d0c23772a 100644
--- a/send-pack.c
+++ b/send-pack.c
@@ -626,7 +626,7 @@ int send_pack(struct send_pack_args *args,
 				strbuf_release(&req_buf);
 				strbuf_release(&cap_buf);
 				reject_atomic_push(remote_refs, args->send_mirror);
-				error("atomic push failed for ref %s. status: %d\n",
+				error("atomic push failed for ref %s. status: %d",
 				      ref->name, ref->status);
 				return args->porcelain ? 0 : -1;
 			}
diff --git a/serve.c b/serve.c
index 884cd84ca8..d674764a25 100644
--- a/serve.c
+++ b/serve.c
@@ -323,7 +323,7 @@ static int process_request(void)
 		die("no command requested");
 
 	if (client_hash_algo != hash_algo_by_ptr(the_repository->hash_algo))
-		die("mismatched object format: server %s; client %s\n",
+		die("mismatched object format: server %s; client %s",
 		    the_repository->hash_algo->name,
 		    hash_algos[client_hash_algo].name);
 
diff --git a/t/helper/test-path-utils.c b/t/helper/test-path-utils.c
index bf0e23ed50..fd6e6cc4a5 100644
--- a/t/helper/test-path-utils.c
+++ b/t/helper/test-path-utils.c
@@ -38,7 +38,7 @@ static void normalize_argv_string(const char **var, const char *input)
 		*var = input;
 
 	if (*var && (**var == '<' || **var == '('))
-		die("Bad value: %s\n", input);
+		die("Bad value: %s", input);
 }
 
 struct test_data {
@@ -78,12 +78,12 @@ static int test_function(struct test_data *data, char *(*func)(char *input),
 		if (!strcmp(to, data[i].to))
 			continue;
 		if (!data[i].alternative)
-			error("FAIL: %s(%s) => '%s' != '%s'\n",
+			error("FAIL: %s(%s) => '%s' != '%s'",
 				funcname, data[i].from, to, data[i].to);
 		else if (!strcmp(to, data[i].alternative))
 			continue;
 		else
-			error("FAIL: %s(%s) => '%s' != '%s', '%s'\n",
+			error("FAIL: %s(%s) => '%s' != '%s', '%s'",
 				funcname, data[i].from, to, data[i].to,
 				data[i].alternative);
 		failed = 1;
diff --git a/t/helper/test-progress.c b/t/helper/test-progress.c
index 66acb6a06c..44be2645e9 100644
--- a/t/helper/test-progress.c
+++ b/t/helper/test-progress.c
@@ -62,13 +62,13 @@ int cmd__progress(int argc, const char **argv)
 			else if (*end == ' ')
 				title = string_list_insert(&titles, end + 1)->string;
 			else
-				die("invalid input: '%s'\n", line.buf);
+				die("invalid input: '%s'", line.buf);
 
 			progress = start_progress(title, total);
 		} else if (skip_prefix(line.buf, "progress ", (const char **) &end)) {
 			uint64_t item_count = strtoull(end, &end, 10);
 			if (*end != '\0')
-				die("invalid input: '%s'\n", line.buf);
+				die("invalid input: '%s'", line.buf);
 			display_progress(progress, item_count);
 		} else if (skip_prefix(line.buf, "throughput ",
 				       (const char **) &end)) {
@@ -76,10 +76,10 @@ int cmd__progress(int argc, const char **argv)
 
 			byte_count = strtoull(end, &end, 10);
 			if (*end != ' ')
-				die("invalid input: '%s'\n", line.buf);
+				die("invalid input: '%s'", line.buf);
 			test_ms = strtoull(end + 1, &end, 10);
 			if (*end != '\0')
-				die("invalid input: '%s'\n", line.buf);
+				die("invalid input: '%s'", line.buf);
 			progress_test_ns = test_ms * 1000 * 1000;
 			display_throughput(progress, byte_count);
 		} else if (!strcmp(line.buf, "update")) {
@@ -87,7 +87,7 @@ int cmd__progress(int argc, const char **argv)
 		} else if (!strcmp(line.buf, "stop")) {
 			stop_progress(&progress);
 		} else {
-			die("invalid input: '%s'\n", line.buf);
+			die("invalid input: '%s'", line.buf);
 		}
 	}
 	strbuf_release(&line);
diff --git a/t/helper/test-reach.c b/t/helper/test-reach.c
index 7314f6c0d8..995e382863 100644
--- a/t/helper/test-reach.c
+++ b/t/helper/test-reach.c
@@ -67,13 +67,13 @@ int cmd__reach(int ac, const char **av)
 		peeled = deref_tag_noverify(the_repository, orig);
 
 		if (!peeled)
-			die("failed to load commit for input %s resulting in oid %s\n",
+			die("failed to load commit for input %s resulting in oid %s",
 			    buf.buf, oid_to_hex(&oid));
 
 		c = object_as_type(peeled, OBJ_COMMIT, 0);
 
 		if (!c)
-			die("failed to load commit for input %s resulting in oid %s\n",
+			die("failed to load commit for input %s resulting in oid %s",
 			    buf.buf, oid_to_hex(&oid));
 
 		switch (buf.buf[0]) {