diff --git a/bosk-core/src/main/java/works/bosk/bytecode/ClassBuilder.java b/bosk-core/src/main/java/works/bosk/bytecode/ClassBuilder.java
index 98ca5069..42235e99 100644
--- a/bosk-core/src/main/java/works/bosk/bytecode/ClassBuilder.java
+++ b/bosk-core/src/main/java/works/bosk/bytecode/ClassBuilder.java
@@ -28,6 +28,7 @@
 import works.bosk.exceptions.NotYetImplementedException;
 import works.bosk.util.ReflectionHelpers;
 
+import static java.lang.System.identityHashCode;
 import static java.lang.reflect.Modifier.isStatic;
 import static java.util.Collections.synchronizedMap;
 import static java.util.Objects.requireNonNull;
@@ -203,7 +204,7 @@ public void invokeDynamic(String name, CallSite callSite) {
 		String fullName = "CallSite_" + CALL_SITE_COUNT.incrementAndGet() + "_" + name;
 
 		CALL_SITES_BY_NAME.put(fullName, callSite);
-		LOGGER.debug("Added call site ({})", name);
+		LOGGER.debug("Added call site \"{}\" {}", fullName, identityHashCode(callSite));
 
 		methodVisitor().visitInvokeDynamicInsn(
 			fullName,
@@ -418,8 +419,9 @@ public Class<?> loadThemBytes(String dottyName, byte[] b) {
 	// happens-before edge between when the call site is added and when we remove it.
 
 	public static CallSite retrieveCallSite(MethodHandles.Lookup __, String name, MethodType ___) {
-		LOGGER.debug("retrieveCallSite({})", name);
-		return requireNonNull(CALL_SITES_BY_NAME.remove(name));
+		CallSite callSite = CALL_SITES_BY_NAME.remove(name);
+		LOGGER.debug("Retrieved call site \"{}\" {}", name, identityHashCode(callSite));
+		return requireNonNull(callSite);
 	}
 
 	private static final Method RETRIEVE_CALL_SITE_METHOD;
diff --git a/lib-testing/src/main/resources/logback.xml b/lib-testing/src/main/resources/logback.xml
index e82ce02b..df9456ed 100644
--- a/lib-testing/src/main/resources/logback.xml
+++ b/lib-testing/src/main/resources/logback.xml
@@ -12,6 +12,7 @@
 
 	<!-- This emits warnings that matter in production but not in tests -->
 	<logger name="works.bosk.drivers.mongo.UninitializedCollectionException" level="ERROR"/>
+	<logger name="works.bosk.bytecode.ClassBuilder" level="DEBUG"/>
 
 	<!-- How to add more tracing during unit tests
 	<logger name="works.bosk.drivers.mongo" level="DEBUG"/>