diff --git a/database.py b/database.py
index 973c1ee..7b17201 100644
--- a/database.py
+++ b/database.py
@@ -1139,6 +1139,7 @@ class Classified(Base):
     # Status
     is_active = Column(Boolean, default=True)
     is_ai_generated = Column(Boolean, default=False)
+    is_test = Column(Boolean, default=False)  # Oznaczenie dla testowych ogłoszeń
     expires_at = Column(DateTime)  # Auto-wygaśnięcie po 30 dniach
     views_count = Column(Integer, default=0)
 
diff --git a/scripts/mark_test_classifieds.py b/scripts/mark_test_classifieds.py
new file mode 100644
index 0000000..66f44a7
--- /dev/null
+++ b/scripts/mark_test_classifieds.py
@@ -0,0 +1,51 @@
+#!/usr/bin/env python3
+"""Oznacz wszystkie obecne ogłoszenia B2B jako testowe."""
+
+import os
+import sys
+from dotenv import load_dotenv
+
+# Load .env first
+load_dotenv()
+
+sys.path.insert(0, os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
+
+from sqlalchemy import text
+from database import SessionLocal, Classified
+
+def main():
+    db = SessionLocal()
+
+    # First, ensure the is_test column exists
+    try:
+        db.execute(text("ALTER TABLE classifieds ADD COLUMN IF NOT EXISTS is_test BOOLEAN DEFAULT FALSE"))
+        db.commit()
+        print("Kolumna is_test dodana (lub już istnieje)")
+    except Exception as e:
+        print(f"Uwaga przy dodawaniu kolumny: {e}")
+        db.rollback()
+
+    # Get all classifieds
+    classifieds = db.query(Classified).all()
+
+    if not classifieds:
+        print("Brak ogłoszeń w bazie danych.")
+        db.close()
+        return
+
+    print(f"Znaleziono {len(classifieds)} ogłoszeń do oznaczenia jako testowe...")
+    print()
+
+    for c in classifieds:
+        c.is_test = True
+        print(f"  ID {c.id}: {c.title[:50]}... ({c.listing_type})")
+
+    db.commit()
+    db.close()
+
+    print()
+    print(f"Oznaczono {len(classifieds)} ogłoszeń jako testowe")
+    print("Gotowe!")
+
+if __name__ == "__main__":
+    main()
diff --git a/templates/classifieds/index.html b/templates/classifieds/index.html
index 542d42a..755970d 100755
--- a/templates/classifieds/index.html
+++ b/templates/classifieds/index.html
@@ -140,6 +140,39 @@
         color: #3730a3;
     }
 
+    /* Test item styling */
+    .classified-card.test-item {
+        opacity: 0.6;
+        border-right: 4px solid #9ca3af;
+    }
+
+    .test-badge {
+        display: inline-block;
+        padding: 2px 8px;
+        border-radius: var(--radius-sm);
+        font-size: var(--font-size-xs);
+        font-weight: 500;
+        background: #f3f4f6;
+        color: #6b7280;
+        margin-left: var(--spacing-xs);
+    }
+
+    .toggle-test-btn {
+        background: #fef3c7;
+        border-color: #fcd34d;
+        color: #92400e;
+    }
+
+    .toggle-test-btn:hover {
+        background: #fde68a;
+    }
+
+    .toggle-test-btn.active {
+        background: var(--primary);
+        border-color: var(--primary);
+        color: white;
+    }
+
     .classified-title {
         font-size: var(--font-size-lg);
         font-weight: 600;
@@ -240,15 +273,23 @@
         <a href="{{ url_for('classifieds_index', type=listing_type, category=cat_value) }}" class="filter-btn {% if category_filter == cat_value %}active{% endif %}">{{ cat_label }}</a>
         {% endfor %}
     </div>
+
+    <div class="filter-group" style="margin-left: auto;">
+        <button type="button" id="toggleTestBtn" class="filter-btn toggle-test-btn" onclick="toggleTestItems()">
+            <span class="hide-label">🙈 Ukryj testowe</span>
+            <span class="show-label" style="display:none;">👁 Pokaż testowe</span>
+        </button>
+    </div>
 </div>
 
 <div class="classifieds-grid">
     {% if classifieds %}
         {% for classified in classifieds %}
-        <div class="classified-card {{ classified.listing_type }}">
+        <div class="classified-card {{ classified.listing_type }} {% if classified.is_test %}test-item{% endif %}">
             <div class="classified-header">
                 <span class="classified-type {{ classified.listing_type }}">{{ 'Szukam' if classified.listing_type == 'szukam' else 'Oferuje' }}</span>
                 <span class="classified-category category-{{ classified.category }}">{{ classified.category|replace('uslugi', 'Usługi')|replace('produkty', 'Produkty')|replace('wspolpraca', 'Współpraca')|replace('praca', 'Praca')|replace('inne', 'Inne')|replace('nieruchomosci', 'Nieruchomości') }}</span>
+                {% if classified.is_test %}<span class="test-badge">Testowe</span>{% endif %}
             </div>
             <div class="classified-title">
                 <a href="{{ url_for('classifieds_view', classified_id=classified.id) }}">{{ classified.title }}</a>
@@ -287,3 +328,37 @@
 </div>
 {% endif %}
 {% endblock %}
+
+{% block extra_js %}
+function setTestItemsVisibility(hidden) {
+    const btn = document.getElementById('toggleTestBtn');
+    const hideLabel = btn.querySelector('.hide-label');
+    const showLabel = btn.querySelector('.show-label');
+    const testItems = document.querySelectorAll('.test-item');
+
+    if (hidden) {
+        testItems.forEach(t => t.style.display = 'none');
+        hideLabel.style.display = 'none';
+        showLabel.style.display = '';
+        btn.classList.add('active');
+    } else {
+        testItems.forEach(t => t.style.display = '');
+        hideLabel.style.display = '';
+        showLabel.style.display = 'none';
+        btn.classList.remove('active');
+    }
+    localStorage.setItem('hideTestClassifieds', hidden ? 'true' : 'false');
+}
+
+function toggleTestItems() {
+    const isCurrentlyHidden = localStorage.getItem('hideTestClassifieds') === 'true';
+    setTestItemsVisibility(!isCurrentlyHidden);
+}
+
+// Apply saved preference on page load
+(function() {
+    if (localStorage.getItem('hideTestClassifieds') === 'true') {
+        setTestItemsVisibility(true);
+    }
+})();
+{% endblock %}