diff --git a/archivebox/core/migrations/0025_cleanup_schema.py b/archivebox/core/migrations/0025_cleanup_schema.py
index 0753b453..4ab000c4 100644
--- a/archivebox/core/migrations/0025_cleanup_schema.py
+++ b/archivebox/core/migrations/0025_cleanup_schema.py
@@ -190,7 +190,7 @@ class Migration(migrations.Migration):
 
     dependencies = [
         ('core', '0024_assign_default_crawl'),
-        ('machine', '0001_initial'),
+        ('machine', '0005_add_process_table'),
         ('crawls', '0002_upgrade_to_0_9_0'),
         migrations.swappable_dependency(settings.AUTH_USER_MODEL),
     ]
diff --git a/archivebox/machine/migrations/0001_initial.py b/archivebox/machine/migrations/0001_initial.py
index aee3400f..bc83ca7b 100644
--- a/archivebox/machine/migrations/0001_initial.py
+++ b/archivebox/machine/migrations/0001_initial.py
@@ -153,8 +153,6 @@ class Migration(migrations.Migration):
                         ('id', models.UUIDField(default=uuid7, editable=False, primary_key=True, serialize=False, unique=True)),
                         ('created_at', models.DateTimeField(db_index=True, default=django.utils.timezone.now)),
                         ('modified_at', models.DateTimeField(auto_now=True)),
-                        ('num_uses_succeeded', models.PositiveIntegerField(default=0)),
-                        ('num_uses_failed', models.PositiveIntegerField(default=0)),
                         ('guid', models.CharField(default=None, editable=False, max_length=64, unique=True)),
                         ('hostname', models.CharField(default=None, max_length=63)),
                         ('hw_in_docker', models.BooleanField(default=False)),
diff --git a/archivebox/plugins/ublock/tests/test_ublock.py b/archivebox/plugins/ublock/tests/test_ublock.py
index 92b935af..91492d4e 100644
--- a/archivebox/plugins/ublock/tests/test_ublock.py
+++ b/archivebox/plugins/ublock/tests/test_ublock.py
@@ -712,12 +712,13 @@ const puppeteer = require('{env_base['NODE_MODULES_DIR']}/puppeteer-core');
             f"With extension: {ext_result['adElementsVisible']} visible ads\n" \
             f"Expected fewer ads with extension."
 
-        # Extension should block at least 10% of ads
-        assert reduction_percent >= 10, \
-            f"uBlock should block at least 10% of ads.\n" \
+        # Extension should block at least 20% of ads (was consistently blocking 5-13% without proper init time)
+        assert reduction_percent >= 20, \
+            f"uBlock should block at least 20% of ads.\n" \
             f"Baseline: {baseline_result['adElementsVisible']} visible ads\n" \
             f"With extension: {ext_result['adElementsVisible']} visible ads\n" \
-            f"Reduction: only {reduction_percent:.0f}% (expected at least 10%)"
+            f"Reduction: only {reduction_percent:.0f}% (expected at least 20%)\n" \
+            f"Note: Filter lists must be downloaded on first run (takes ~15s)"
 
         print(f"\n✓ SUCCESS: uBlock correctly blocks ads!")
         print(f"  - Baseline: {baseline_result['adElementsVisible']} visible ads")