diff --git a/README.md b/README.md
index aea4d142..b7c2daf8 100644
--- a/README.md
+++ b/README.md
@@ -1502,7 +1502,7 @@ Notes:
     - **`name`**: [string=''] Used to identify this particular output definition.
     - **`options`**: [dict] Options for the `diff` output.
       * Valid keys:
-        - **`output`**: [string='%f-%i%I%v.%x'] Filename for the output (%i=diff, %x=pdf). Affected by global options.
+        - **`output`**: [string='%f-%i%I%v.%x'] Filename for the output (%i=diff_pcb/diff_sch, %x=pdf). Affected by global options.
         - `add_link_id`: [boolean=false] When enabled we create a symlink to the output file with a name that contains the
                          git hashes involved in the comparison. If you plan to compress the output don't
                          forget to disable the `follow_links` option.
diff --git a/docs/samples/generic_plot.kibot.yaml b/docs/samples/generic_plot.kibot.yaml
index 0c1b26d4..f6417e32 100644
--- a/docs/samples/generic_plot.kibot.yaml
+++ b/docs/samples/generic_plot.kibot.yaml
@@ -442,7 +442,7 @@ outputs:
       # [string='git'] [git,file] How to interpret the `old` name. Use `git` for a git hash, branch, etc.
       # Use `file` for a file name
       old_type: 'git'
-      # [string='%f-%i%I%v.%x'] Filename for the output (%i=diff, %x=pdf). Affected by global options
+      # [string='%f-%i%I%v.%x'] Filename for the output (%i=diff_pcb/diff_sch, %x=pdf). Affected by global options
       output: '%f-%i%I%v.%x'
       # [boolean=true] Compare the PCB, otherwise compare the schematic
       pcb: true
diff --git a/kibot/out_diff.py b/kibot/out_diff.py
index 1e3116b9..5086dce5 100644
--- a/kibot/out_diff.py
+++ b/kibot/out_diff.py
@@ -58,7 +58,7 @@ class DiffOptions(BaseOptions):
     def __init__(self):
         with document:
             self.output = GS.def_global_output
-            """ *Filename for the output (%i=diff, %x=pdf) """
+            """ *Filename for the output (%i=diff_pcb/diff_sch, %x=pdf) """
             self.pcb = True
             """ Compare the PCB, otherwise compare the schematic """
             self.old = 'HEAD'
@@ -95,6 +95,10 @@ class DiffOptions(BaseOptions):
         self._expand_id = 'diff'
         self._expand_ext = 'pdf'
 
+    def config(self, parent):
+        super().config(parent)
+        self._expand_id = 'diff'+'_pcb' if self.pcb else '_sch'
+
     def get_targets(self, out_dir):
         return [self._parent.expand_filename(out_dir, self.output)]
 
diff --git a/tests/reference/5_1_6/light_control-diff.pdf b/tests/reference/5_1_6/light_control-diff_pcb.pdf
similarity index 100%
rename from tests/reference/5_1_6/light_control-diff.pdf
rename to tests/reference/5_1_6/light_control-diff_pcb.pdf
diff --git a/tests/reference/5_1_7/light_control-diff.pdf b/tests/reference/5_1_7/light_control-diff.pdf
deleted file mode 120000
index 023b0694..00000000
--- a/tests/reference/5_1_7/light_control-diff.pdf
+++ /dev/null
@@ -1 +0,0 @@
-../5_1_6/light_control-diff.pdf
\ No newline at end of file
diff --git a/tests/reference/5_1_7/light_control-diff_pcb.pdf b/tests/reference/5_1_7/light_control-diff_pcb.pdf
new file mode 120000
index 00000000..bff03d07
--- /dev/null
+++ b/tests/reference/5_1_7/light_control-diff_pcb.pdf
@@ -0,0 +1 @@
+../5_1_6/light_control-diff_pcb.pdf
\ No newline at end of file
diff --git a/tests/reference/6_0_4/light_control-diff.pdf b/tests/reference/6_0_4/light_control-diff_pcb.pdf
similarity index 100%
rename from tests/reference/6_0_4/light_control-diff.pdf
rename to tests/reference/6_0_4/light_control-diff_pcb.pdf
diff --git a/tests/test_plot/test_misc.py b/tests/test_plot/test_misc.py
index 354bb32e..479bb747 100644
--- a/tests/test_plot/test_misc.py
+++ b/tests/test_plot/test_misc.py
@@ -1304,7 +1304,7 @@ def test_diff_git_1(test_dir):
     shutil.copy2(ctx.board_file.replace(prj, prj+'_diff'), file)
     # Run the test
     ctx.run(extra=['-b', file], no_board_file=True)
-    ctx.compare_pdf(prj+'-diff.pdf')
+    ctx.compare_pdf(prj+'-diff_pcb.pdf')
     ctx.clean_up(keep_project=True)
 
 
@@ -1339,7 +1339,7 @@ def test_diff_git_2(test_dir):
     shutil.copy2(ctx.board_file.replace(prj, '3Rs'), file)
     # Run the test
     ctx.run(extra=['-b', file], no_board_file=True, extra_debug=True)
-    ctx.compare_pdf(prj+'-diff.pdf')
+    ctx.compare_pdf(prj+'-diff_pcb.pdf')
     ctx.clean_up(keep_project=True)
 
 
@@ -1372,5 +1372,5 @@ def test_diff_git_3(test_dir):
     ctx.run_command(['git', 'commit', '-m', 'New version'], chdir_out=True)
     # Run the test
     ctx.run(extra=['-b', file], no_board_file=True, extra_debug=True)
-    ctx.compare_pdf(prj+'-diff.pdf')
+    ctx.compare_pdf(prj+'-diff_pcb.pdf')
     ctx.clean_up(keep_project=True)