diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index e382280..8da376f 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -58,13 +58,11 @@ jobs:
         python tools/make_example.py
         python tools/extract_code.py "bin/test.copapy" "bin/test.copapy.bin"
         objdump -D -b binary -m i386:x86-64 --adjust-vma=0x1000 bin/test.copapy.bin > bin/test.copapy.asm
-        echo '<p>test.copapy.asm</p><pre>' >> $GITHUB_STEP_SUMMARY
-        cat bin/test.copapy.asm >> $GITHUB_STEP_SUMMARY
-        echo '</pre>' >> $GITHUB_STEP_SUMMARY
-        objdump -d -j .text src/copapy/obj/stencils_x86_64_O3.o > bin/stencils_x86_64_O3.asm
-        echo '<p>stencils_x86_64_O3.asm</p><pre>' >> $GITHUB_STEP_SUMMARY
-        cat bin/stencils_x86_64_O3.asm >> $GITHUB_STEP_SUMMARY
-        echo '</pre>' >> $GITHUB_STEP_SUMMARY
+        echo '<p>test.copapy.asm</p>' >> $GITHUB_STEP_SUMMARY
+        python tools/clean_asm.py bin/test.copapy.asm >> $GITHUB_STEP_SUMMARY
+        objdump -d -x src/copapy/obj/stencils_x86_64_O3.o > bin/stencils_x86_64_O3.asm
+        echo '<p>stencils_x86_64_O3.asm</p>' >> $GITHUB_STEP_SUMMARY
+        python tools/clean_asm.py bin/stencils_x86_64_O3.asm >> $GITHUB_STEP_SUMMARY
 
     - name: Run tests with pytest
       run: pytest
diff --git a/tools/clean_asm.py b/tools/clean_asm.py
new file mode 100644
index 0000000..9ade8b6
--- /dev/null
+++ b/tools/clean_asm.py
@@ -0,0 +1,36 @@
+import argparse
+import re
+
+def main() -> None:
+    parser = argparse.ArgumentParser()
+    parser.add_argument("path", type=str, help="Input file path")
+    args = parser.parse_args()
+
+    regex = r"(\:\n)(.*?)(^[^\n]+\n[^\n]+result_.*?\n\n)"
+    subst = "\\g<1><b>\\g<2></b><i>\\g<3></i>"
+
+    with open(args.path, 'rt') as f:
+        text = f.read()
+
+    outp_flag = "Disassembly of section .text" not in text
+
+    text = text.replace('\t', ' ' * 4)
+    text = text.replace('>', '&gt;')
+    text = text.replace('<', '&lt;')
+
+    text = re.sub(regex, subst, text, 0, re.MULTILINE | re.DOTALL)
+
+    text = re.sub(r"(?<= ) ", "&nbsp;", text, 0, re.MULTILINE | re.DOTALL)
+
+    print('<code>')
+    for line in text.splitlines():
+        if outp_flag:
+            print(line + '<br>')
+
+        if "Disassembly of section .text:" in line:
+            outp_flag = True
+            
+    print('</code>')
+
+if __name__ == "__main__":
+    main()