diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 0fdd89c..b31c7db 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -22,7 +22,7 @@ jobs:
       - name: Run tests
         run: |
           set -euo pipefail
-          carp -x test/strbuf.carp
+          carp -x --log-memory test/strbuf.carp
 
       - name: Install angler
         run: |
diff --git a/README.md b/README.md
index 3bd27bc..694ea9d 100644
--- a/README.md
+++ b/README.md
@@ -5,7 +5,7 @@ A growable string buffer for Carp.
 ## Installation
 
 ```clojure
-(load "git@github.com:carpentry-org/strbuf@0.2.0")
+(load "git@github.com:carpentry-org/strbuf@0.2.1")
 ```
 
 ## Usage
@@ -45,7 +45,7 @@ allocates a new string on every call.
 ## Testing
 
 ```
-carp -x test/strbuf.carp
+carp -x --log-memory test/strbuf.carp
 ```
 
 <hr/>
diff --git a/docs/StringBuf.html b/docs/StringBuf.html
index 6c13e0f..8710b7f 100644
--- a/docs/StringBuf.html
+++ b/docs/StringBuf.html
@@ -35,7 +35,7 @@ <h1>
 every call), <code>StringBuf</code> tracks capacity and grows geometrically, giving
 amortized O(1) appends.</p>
 <h2>Installation</h2>
-<pre><code>(load &quot;git@github.com:carpentry-org/strbuf@0.2.0&quot;)
+<pre><code>(load &quot;git@github.com:carpentry-org/strbuf@0.2.1&quot;)
 </code></pre>
 <h2>Usage</h2>
 <pre><code>(let [sb (StringBuf.create)]
diff --git a/strbuf.carp b/strbuf.carp
index d30fe12..5e81c0d 100644
--- a/strbuf.carp
+++ b/strbuf.carp
@@ -6,7 +6,7 @@ amortized O(1) appends.
 ## Installation
 
 ```
-(load \"git@github.com:carpentry-org/strbuf@0.2.0\")
+(load \"git@github.com:carpentry-org/strbuf@0.2.1\")
 ```
 
 ## Usage
@@ -77,6 +77,7 @@ modifying the buffer.")
 
   (doc delete "frees the buffer.")
   (register delete (Fn [StringBuf] ()))
+  (implements delete StringBuf.delete)
 
   (register copy (Fn [&StringBuf] StringBuf))
   (implements copy StringBuf.copy))
diff --git a/test/strbuf.carp b/test/strbuf.carp
index 1eeb8df..36f2f75 100644
--- a/test/strbuf.carp
+++ b/test/strbuf.carp
@@ -155,4 +155,12 @@
     &(let-do [sb (StringBuf.with-capacity 0)]
       (StringBuf.append-str &sb "hello")
       (let-do [s (StringBuf.to-string &sb)] (StringBuf.delete sb) s))
-    "with-capacity 0 buffer grows and is usable"))
+    "with-capacity 0 buffer grows and is usable")
+
+  (assert-equal test
+    0l
+    (do
+      (Debug.reset-memory-balance!)
+      (let [sb (StringBuf.create)] ())
+      (Debug.memory-balance))
+    "owned buffers are deleted automatically at scope exit"))