diff --git a/ethereum/contracts/core/Forum.sol b/ethereum/contracts/core/Forum.sol
index 8d1c178..4f540da 100644
--- a/ethereum/contracts/core/Forum.sol
+++ b/ethereum/contracts/core/Forum.sol
@@ -25,7 +25,9 @@ contract Forum is Reputation {
 
     event PostAdded(uint postIndex);
 
-    // TODO: Add forum parameters
+    // Forum parameters
+    // TODO: Make depth limit configurable; take as param in _onValidatePost callback
+    uint depthLimit = 3;
 
     function addPost(
         address author,
@@ -103,6 +105,9 @@ contract Forum is Reputation {
         bool initialNegative,
         uint depth
     ) internal returns (int refundToInbound) {
+        if (depth >= depthLimit) {
+            return amount;
+        }
         Post storage post = posts[postIndex];
         int totalOutboundAmount;
         // Propagate negative citations first
diff --git a/ethereum/test/Forum.js b/ethereum/test/Forum.js
index 09c7917..ad751f2 100644
--- a/ethereum/test/Forum.js
+++ b/ethereum/test/Forum.js
@@ -162,14 +162,12 @@ describe('Forum', () => {
       await initiateValidationPool({ postIndex: 0 });
       await dao.evaluateOutcome(0);
       expect(await dao.balanceOf(account1)).to.equal(100);
-      console.log('Second post');
       await dao.addPost(account2, 'second-content-id', [{ weightPercent: 50, targetPostIndex: 0 }]);
       await initiateValidationPool({ postIndex: 1 });
       await time.increase(POOL_DURATION + 1);
       await dao.evaluateOutcome(1);
       expect(await dao.balanceOf(account1)).to.equal(150);
       expect(await dao.balanceOf(account2)).to.equal(50);
-      console.log('Third post');
       await dao.addPost(account3, 'third-content-id', [{ weightPercent: -100, targetPostIndex: 1 }]);
       await initiateValidationPool({ postIndex: 2, fee: 200 });
       await time.increase(POOL_DURATION + 1);
@@ -179,20 +177,17 @@ describe('Forum', () => {
       expect(await dao.balanceOf(account3)).to.equal(300);
     });
 
-    it('should limit effects of negative references', async () => {
-      console.log('First post');
+    it('should limit effects of negative references on prior negative references', async () => {
       await dao.addPost(account1, 'content-id', []);
       await initiateValidationPool({ postIndex: 0 });
       await dao.evaluateOutcome(0);
       expect(await dao.balanceOf(account1)).to.equal(100);
-      console.log('Second post');
       await dao.addPost(account2, 'second-content-id', [{ weightPercent: -100, targetPostIndex: 0 }]);
       await initiateValidationPool({ postIndex: 1 });
       await time.increase(POOL_DURATION + 1);
       await dao.evaluateOutcome(1);
       expect(await dao.balanceOf(account1)).to.equal(0);
       expect(await dao.balanceOf(account2)).to.equal(200);
-      console.log('Third post');
       await dao.addPost(account3, 'third-content-id', [{ weightPercent: -100, targetPostIndex: 1 }]);
       await initiateValidationPool({ postIndex: 2, fee: 200 });
       await time.increase(POOL_DURATION + 1);
@@ -201,5 +196,24 @@ describe('Forum', () => {
       expect(await dao.balanceOf(account2)).to.equal(0);
       expect(await dao.balanceOf(account3)).to.equal(300);
     });
+
+    it('should enforce depth limit', async () => {
+      await dao.addPost(account1, 'content-id-1', []);
+      await dao.addPost(account1, 'content-id-2', [{ weightPercent: 100, targetPostIndex: 0 }]);
+      await dao.addPost(account1, 'content-id-3', [{ weightPercent: 100, targetPostIndex: 1 }]);
+      await dao.addPost(account1, 'content-id-4', [{ weightPercent: 100, targetPostIndex: 2 }]);
+      await initiateValidationPool({ postIndex: 3 });
+      await dao.evaluateOutcome(0);
+      const posts = await Promise.all([
+        await dao.posts(0),
+        await dao.posts(1),
+        await dao.posts(2),
+        await dao.posts(3),
+      ]);
+      expect(posts[0].reputation).to.equal(0);
+      expect(posts[1].reputation).to.equal(100);
+      expect(posts[2].reputation).to.equal(0);
+      expect(posts[3].reputation).to.equal(0);
+    });
   });
 });