diff --git a/front_end/glue.py b/front_end/glue.py
index 3a2f0fa..691b126 100644
--- a/front_end/glue.py
+++ b/front_end/glue.py
@@ -111,7 +111,7 @@
 
   def format_module_ir(self):
     """Renders self.ir in a human-readable format."""
-    return repr(self.ir)
+    return self.ir.to_json(indent=2)
 
 
 def format_production_set(productions):
diff --git a/front_end/glue_test.py b/front_end/glue_test.py
index 1435922..2f3f5fa 100644
--- a/front_end/glue_test.py
+++ b/front_end/glue_test.py
@@ -155,7 +155,8 @@
     self.assertEqual(_SPAN_SE_LOG_FILE_PARSE_TREE_TEXT.strip(),
                      debug_info.format_parse_tree().strip())
     self.assertEqual(_SPAN_SE_LOG_FILE_IR, debug_info.ir)
-    self.assertEqual(repr(_SPAN_SE_LOG_FILE_IR), debug_info.format_module_ir())
+    self.assertEqual(_SPAN_SE_LOG_FILE_IR.to_json(indent=2),
+                     debug_info.format_module_ir())
 
   def test_parse_emboss_file(self):
     # parse_emboss_file calls parse_module, wraps its results, and calls
diff --git a/testdata/golden/span_se_log_file_status.ir.txt b/testdata/golden/span_se_log_file_status.ir.txt
index ad6fcaf..942b49a 100644
--- a/testdata/golden/span_se_log_file_status.ir.txt
+++ b/testdata/golden/span_se_log_file_status.ir.txt
@@ -1 +1,1087 @@
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