diff --git a/src/processor/ledger/beancount_to_jsonl.py b/src/processor/ledger/beancount_to_jsonl.py
index b60272dd..50fbda5d 100644
--- a/src/processor/ledger/beancount_to_jsonl.py
+++ b/src/processor/ledger/beancount_to_jsonl.py
@@ -77,12 +77,14 @@ def get_beancount_files(beancount_files=None, beancount_file_filters=None):
             for filtered_file in glob.glob(get_absolute_path(beancount_file_filter))
         }
 
-    all_beancount_files = absolute_beancount_files | filtered_beancount_files
+    all_beancount_files = sorted(absolute_beancount_files | filtered_beancount_files)
 
-    files_with_non_beancount_extensions = {beancount_file
-                                    for beancount_file
-                                    in all_beancount_files
-                                    if not beancount_file.endswith(".bean") and not beancount_file.endswith(".beancount")}
+    files_with_non_beancount_extensions = {
+        beancount_file
+        for beancount_file
+        in all_beancount_files
+        if not beancount_file.endswith(".bean") and not beancount_file.endswith(".beancount")
+    }
     if any(files_with_non_beancount_extensions):
         print(f"[Warning] There maybe non beancount files in the input set: {files_with_non_beancount_extensions}")
 
diff --git a/src/processor/markdown/markdown_to_jsonl.py b/src/processor/markdown/markdown_to_jsonl.py
index d0f959ab..f0473700 100644
--- a/src/processor/markdown/markdown_to_jsonl.py
+++ b/src/processor/markdown/markdown_to_jsonl.py
@@ -75,7 +75,7 @@ def get_markdown_files(markdown_files=None, markdown_file_filters=None):
             for filtered_file in glob.glob(get_absolute_path(markdown_file_filter))
         }
 
-    all_markdown_files = absolute_markdown_files | filtered_markdown_files
+    all_markdown_files = sorted(absolute_markdown_files | filtered_markdown_files)
 
     files_with_non_markdown_extensions = {
         md_file
diff --git a/src/processor/org_mode/org_to_jsonl.py b/src/processor/org_mode/org_to_jsonl.py
index 3ab1ca3b..52d70a68 100644
--- a/src/processor/org_mode/org_to_jsonl.py
+++ b/src/processor/org_mode/org_to_jsonl.py
@@ -82,7 +82,7 @@ def get_org_files(org_files=None, org_file_filters=None):
             for filtered_file in glob.glob(get_absolute_path(org_file_filter))
         }
 
-    all_org_files = absolute_org_files | filtered_org_files
+    all_org_files = sorted(absolute_org_files | filtered_org_files)
 
     files_with_non_org_extensions = {org_file for org_file in all_org_files if not org_file.endswith(".org")}
     if any(files_with_non_org_extensions):
diff --git a/tests/test_beancount_to_jsonl.py b/tests/test_beancount_to_jsonl.py
index c347fc6a..51a4dffd 100644
--- a/tests/test_beancount_to_jsonl.py
+++ b/tests/test_beancount_to_jsonl.py
@@ -89,7 +89,7 @@ def test_get_beancount_files(tmp_path):
     create_file(tmp_path, filename="not-included-ledger.bean")
     create_file(tmp_path, filename="not-included-text.txt")
 
-    expected_files = set(map(str, [group1_file1, group1_file2, group2_file1, group2_file2, file1]))
+    expected_files = sorted(map(str, [group1_file1, group1_file2, group2_file1, group2_file2, file1]))
 
     # Setup input-files, input-filters
     input_files = [tmp_path / 'ledger.bean']
diff --git a/tests/test_markdown_to_jsonl.py b/tests/test_markdown_to_jsonl.py
index 324fab9e..89c471d8 100644
--- a/tests/test_markdown_to_jsonl.py
+++ b/tests/test_markdown_to_jsonl.py
@@ -86,7 +86,7 @@ def test_get_markdown_files(tmp_path):
     create_file(tmp_path, filename="not-included-markdown.md")
     create_file(tmp_path, filename="not-included-text.txt")
 
-    expected_files = set(map(str, [group1_file1, group1_file2, group2_file1, group2_file2, file1]))
+    expected_files = sorted(map(str, [group1_file1, group1_file2, group2_file1, group2_file2, file1]))
 
     # Setup input-files, input-filters
     input_files = [tmp_path / 'notes.md']
diff --git a/tests/test_org_to_jsonl.py b/tests/test_org_to_jsonl.py
index 75cbf766..8a2f58ba 100644
--- a/tests/test_org_to_jsonl.py
+++ b/tests/test_org_to_jsonl.py
@@ -95,7 +95,7 @@ def test_get_org_files(tmp_path):
     create_file(tmp_path, filename="orgfile2.org")
     create_file(tmp_path, filename="text1.txt")
 
-    expected_files = set(map(str, [group1_file1, group1_file2, group2_file1, group2_file2, orgfile1]))
+    expected_files = sorted(map(str, [group1_file1, group1_file2, group2_file1, group2_file2, orgfile1]))
 
     # Setup input-files, input-filters
     input_files = [tmp_path / 'orgfile1.org']