diff --git a/PostText.pl b/PostText.pl
index d9887bc..ea2c361 100755
--- a/PostText.pl
+++ b/PostText.pl
@@ -28,6 +28,8 @@ helper thread => sub {
 under sub ($c) {
     $c->session(expires => time() + 31536000);
 
+    $c->stash(status => 400) if $c->flash('invalid_input');
+
     1;
 };
 
@@ -51,10 +53,6 @@ group {
             base_path => $base_path
             );
 
-        unless (my $thread = @$threads[0]) {
-            $c->stash(status => 404)
-        }
-
         $c->render();
     };
 };
@@ -74,8 +72,16 @@ any [qw{GET POST}], '/post', sub ($c) {
         $v->required('title')->size(1, 127 );
         $v->required('post' )->size(2, 4000);
 
-        $c->thread->create_thread($thread_author, $thread_title, $thread_body)
-            unless $v->has_error();
+        if ($v->has_error) {
+            $c->flash(invalid_input => 'Invalid thread title/text.')
+        }
+        else {
+            $c->thread->create_thread(
+                $thread_author,
+                $thread_title,
+                $thread_body
+                )
+        }
 
         return $c->redirect_to('view');
     }
diff --git a/README.md b/README.md
index cdbe94c..aba5800 100644
--- a/README.md
+++ b/README.md
@@ -24,7 +24,6 @@ Run the tests locally (against development environment)
 
 ## TODOs
 
-1. Handle POST with no params (error)
-1. Moar tests...
+1. Display error for invalid input (call `flash()` in template)
 1. Pick a date format
-1. **Moar tests!!**
+1. Reply model
diff --git a/t/post.t b/t/post.t
index 33dd6cb..8ab4305 100644
--- a/t/post.t
+++ b/t/post.t
@@ -6,20 +6,29 @@ use Test::More;
 use Mojo::File qw{curfile};
 use Test::Mojo;
 
-my $script = curfile->dirname->sibling('PostText.pl');
-my $t      = Test::Mojo->new($script);
-my %valid_params = (
+my $script         = curfile->dirname->sibling('PostText.pl');
+my $t              = Test::Mojo->new($script);
+my %valid_params   = (
     name  => 'Anonymous',
     title => 'hi',
     post  => 'ayy... lmao'
     );
+my %invalid_params = (
+    name => 'Anonymous',
+    title => '',
+    post => 'a'
+    );
 
 $t->ua->max_redirects(1);
 
-$t->get_ok('/post')->status_is(200)->text_like(h2 => qr/New Thread/);;
+# GET
+$t->get_ok('/post')->status_is(200)->text_like(h2 => qr/New Thread/);
 
-# This should fail!! 08142022
-$t->post_ok('/post')->status_is(200);
+# POST
+$t->post_ok('/post')->status_is(200)->text_like(h2 => qr/New Thread/);
+
+$t->post_ok('/post', form => \%invalid_params)->status_is(400)
+    ->text_like(h2 => qr/View Threads/);
 
 $t->post_ok('/post', form => \%valid_params)->status_is(200)
     ->text_like(h2 => qr/View Threads/);