diff --git a/src/bot.zig b/src/bot.zig
index fceb37e..c35219f 100644
--- a/src/bot.zig
+++ b/src/bot.zig
@@ -274,24 +274,6 @@ pub const Bot = struct {
         return (idx - 1) % self.backlog.len;
     }
 
-    fn previous_message(self: *Bot, comptime pred: *const fn (Message) bool) ?Message {
-        var idx = self.previous_idx(self.top);
-        while (true) : (idx = self.previous_idx(idx)) {
-            if (self.backlog[idx] == null) {
-                return null;
-            }
-            const message = self.backlog[idx] orelse unreachable;
-            if (pred(message)) {
-                return message;
-            }
-            if (idx == self.bottom) {
-                // reached the start of the list
-                break;
-            }
-        }
-        return null;
-    }
-
     fn previous_message_by_author(self: *Bot, author: []const u8, targets: []const u8) ?Message {
         var idx = self.previous_idx(self.top);
         while (true) : (idx = self.previous_idx(idx)) {
@@ -330,49 +312,6 @@ test "hear_wraps" {
     try std.testing.expect(bot.no_messages() == 1024);
 }
 
-test "previous_message" {
-    var bot = try Bot.init(std.testing.allocator);
-    defer bot.deinit();
-
-    const callback = struct {
-        fn callback(_: Message) bool {
-            return true;
-        }
-    }.callback;
-    const prev = bot.previous_message(callback);
-
-    try std.testing.expect(prev == null);
-}
-
-test "previous_message1" {
-    var bot = try Bot.init(std.testing.allocator);
-    defer bot.deinit();
-    var contents: [10][]const u8 = .{undefined} ** 10;
-
-    for (0..10) |i| {
-        contents[i] = try std.fmt.allocPrint(std.testing.allocator, "{d}", .{i});
-        const msg = Message{
-            .author = "Jassob",
-            .timestamp = @as(u32, @intCast(i)),
-            .content = contents[i],
-        };
-        bot.hear(msg);
-    }
-
-    const callback = struct {
-        fn callback(msg: Message) bool {
-            return std.mem.eql(u8, msg.content, "8");
-        }
-    }.callback;
-    const prev = bot.previous_message(callback);
-
-    for (contents) |str| {
-        std.testing.allocator.free(str);
-    }
-
-    try std.testing.expect(prev != null);
-}
-
 test "execute_substitution_no_previous_message" {
     var bot = try Bot.init(std.testing.allocator);
     defer bot.deinit();