diff --git a/pkg/urbit/noun/hashtable.c b/pkg/urbit/noun/hashtable.c
index 8ae60209e..40e36ef9e 100644
--- a/pkg/urbit/noun/hashtable.c
+++ b/pkg/urbit/noun/hashtable.c
@@ -400,7 +400,7 @@ _ch_trim_slot(u3h_root* har_u, u3h_slot *sot_w, c3_w lef_w, c3_w rem_w)
   }
 }
 
-/* _ch_trim_slot(): trim one entry from a hashtable
+/* _ch_trim_root(): trim one entry from a hashtable
 */
 static c3_o
 _ch_trim_root(u3h_root* har_u)
diff --git a/pkg/urbit/tests/hashtable_tests.c b/pkg/urbit/tests/hashtable_tests.c
index c9c1bb822..7bd3e9538 100644
--- a/pkg/urbit/tests/hashtable_tests.c
+++ b/pkg/urbit/tests/hashtable_tests.c
@@ -1,4 +1,5 @@
 #include "all.h"
+#include "vere/vere.h"
 
 // defined in noun/hashtable.c
 c3_w _ch_skip_slot(c3_w mug_w, c3_w lef_w);
@@ -8,6 +9,8 @@ c3_w _ch_skip_slot(c3_w mug_w, c3_w lef_w);
 static void
 _setup(void)
 {
+  u3C.wag_w = u3C.wag_w | u3o_debug_ram;
+
   u3m_init();
   u3m_pave(c3y);
 }
@@ -136,26 +139,33 @@ static c3_i
 _test_cache_trimming(void)
 {
   c3_i ret_i = 1;
-  c3_w max_w = 620;
+  c3_w max_w = 620000;
   c3_w   i_w;
 
   //u3p(u3h_root) har_p = u3h_new_cache(max_w / 2);
-  u3p(u3h_root) har_p = u3h_new_cache(max_w / 10 );
+  u3p(u3h_root) har_p = u3h_new_cache(max_w / 10);
   u3h_root*     har_u = u3to(u3h_root, har_p);
 
   for ( i_w = 0; i_w < max_w; i_w++ ) {
-    u3h_put(har_p, i_w, i_w + max_w);
+    u3_noun key = u3nc(i_w,i_w);
+    u3h_put(har_p, key, u3nc(i_w,i_w + max_w));
+    u3z(key);
   }
 
-  if ( ( max_w + max_w - 1) != u3h_get(har_p, max_w - 1) ) {
+  u3_noun key = u3nc(max_w-1,max_w-1);
+  u3_noun val = u3h_get(har_p, key);
+  if ( ( max_w + max_w - 1) != u3t(val) ) {
     fprintf(stderr, "cache_trimming (a): fail\r\n");
     ret_i = 0;
   }
   if ( ( max_w / 10 ) != har_u->use_w ) {
-    fprintf(stderr, "cache_trimming (b): fail\r\n");
+    fprintf(stderr, "cache_trimming (b): fail %d %d\r\n",
+            max_w / 10, har_u->use_w );
     ret_i = 0;
   }
 
+  u3z(key);
+  u3z(val);
   u3h_free(har_p);
   return ret_i;
 }
@@ -186,6 +196,8 @@ _test_cache_replace_value(void)
   }
   if ( max_w != har_u->use_w ) {
     fprintf(stderr, "cache_replace (b): fail\r\n");
+    fprintf(stderr, "cache_replace (b): fail %d %d\r\n",
+            max_w, har_u->use_w );
     ret_i = 0;
   }