diff --git a/test/ruby/test_zjit.rb b/test/ruby/test_zjit.rb
index 83af7347d61da9..c6dbc01dc2e129 100644
--- a/test/ruby/test_zjit.rb
+++ b/test/ruby/test_zjit.rb
@@ -2127,6 +2127,7 @@ def test = 1
         # After reset, counters should be zero or at least much smaller
         # (some instructions might execute between reset and reading stats)
         :zjit_insn_count.then { |s| initial_stats[s] > 0 && reset_stats[s] < initial_stats[s] },
+        :compiled_iseq_count.then { |s| initial_stats[s] > 0 && reset_stats[s] < initial_stats[s] }
       ].all?
     }, stats: true
   end
diff --git a/tool/merger.rb b/tool/merger.rb
index 8b12334b735df4..795e97a86ee529 100755
--- a/tool/merger.rb
+++ b/tool/merger.rb
@@ -263,7 +263,7 @@ def execute(*cmd, interactive: false)
     end
 
     # Merge revision from Git patch
-    git_uri = "https://git.ruby-lang.org/ruby.git/patch/?id=#{git_rev}"
+    git_uri = "https://github.com/ruby/ruby/commit/#{git_rev}.patch"
     resp = Net::HTTP.get_response(URI(git_uri))
     if resp.code != '200'
       abort "'#{git_uri}' returned status '#{resp.code}':\n#{resp.body}"
diff --git a/zjit/src/stats.rs b/zjit/src/stats.rs
index 323af0f3ed2695..a9b7270444a7a5 100644
--- a/zjit/src/stats.rs
+++ b/zjit/src/stats.rs
@@ -48,13 +48,13 @@ macro_rules! make_counters {
         }
 
         impl Counter {
-            pub fn name(&self) -> String {
+            pub fn name(&self) -> &'static str {
                 match self {
-                    $( Counter::$default_counter_name => stringify!($default_counter_name).to_string(), )+
-                    $( Counter::$exit_counter_name => stringify!($exit_counter_name).to_string(), )+
-                    $( Counter::$dynamic_send_counter_name => stringify!($dynamic_send_counter_name).to_string(), )+
-                    $( Counter::$optimized_send_counter_name => stringify!($optimized_send_counter_name).to_string(), )+
-                    $( Counter::$counter_name => stringify!($counter_name).to_string(), )+
+                    $( Counter::$default_counter_name => stringify!($default_counter_name), )+
+                    $( Counter::$exit_counter_name => stringify!($exit_counter_name), )+
+                    $( Counter::$dynamic_send_counter_name => stringify!($dynamic_send_counter_name), )+
+                    $( Counter::$optimized_send_counter_name => stringify!($optimized_send_counter_name), )+
+                    $( Counter::$counter_name => stringify!($counter_name), )+
                 }
             }
         }