diff --git a/crates/ruff_linter/resources/test/fixtures/refurb/FURB103.py b/crates/ruff_linter/resources/test/fixtures/refurb/FURB103.py
index b6d8e1d034..35d9600d41 100644
--- a/crates/ruff_linter/resources/test/fixtures/refurb/FURB103.py
+++ b/crates/ruff_linter/resources/test/fixtures/refurb/FURB103.py
@@ -145,3 +145,11 @@ with open("file.txt", "w") as f:
 with open("file.txt", "w") as f:
     for line in text:
         f.write(line)
+
+# See: https://github.com/astral-sh/ruff/issues/20785
+import json
+
+data = {"price": 100}
+
+with open("test.json", "wb") as f:
+    f.write(json.dumps(data, indent=4).encode("utf-8"))
\ No newline at end of file
diff --git a/crates/ruff_linter/src/rules/refurb/rules/write_whole_file.rs b/crates/ruff_linter/src/rules/refurb/rules/write_whole_file.rs
index bbee6dcb5a..da99733efd 100644
--- a/crates/ruff_linter/src/rules/refurb/rules/write_whole_file.rs
+++ b/crates/ruff_linter/src/rules/refurb/rules/write_whole_file.rs
@@ -5,7 +5,6 @@ use ruff_python_ast::{
     relocate::relocate_expr,
     visitor::{self, Visitor},
 };
-
 use ruff_python_codegen::Generator;
 use ruff_text_size::{Ranged, TextRange};
 
diff --git a/crates/ruff_linter/src/rules/refurb/snapshots/ruff_linter__rules__refurb__tests__FURB103_FURB103.py.snap b/crates/ruff_linter/src/rules/refurb/snapshots/ruff_linter__rules__refurb__tests__FURB103_FURB103.py.snap
index dfb111341e..74f3749953 100644
--- a/crates/ruff_linter/src/rules/refurb/snapshots/ruff_linter__rules__refurb__tests__FURB103_FURB103.py.snap
+++ b/crates/ruff_linter/src/rules/refurb/snapshots/ruff_linter__rules__refurb__tests__FURB103_FURB103.py.snap
@@ -134,3 +134,14 @@ FURB103 `open` and `write` should be replaced by `Path("file.txt").write_text(fo
 75 |     f.write(foobar)
    |
 help: Replace with `Path("file.txt").write_text(foobar, newline="\r\n")`
+
+FURB103 `open` and `write` should be replaced by `Path("test.json")....`
+   --> FURB103.py:154:6
+    |
+152 | data = {"price": 100}
+153 |
+154 | with open("test.json", "wb") as f:
+    |      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+155 |     f.write(json.dumps(data, indent=4).encode("utf-8"))
+    |
+help: Replace with `Path("test.json")....`
diff --git a/crates/ruff_linter/src/rules/refurb/snapshots/ruff_linter__rules__refurb__tests__preview_FURB103_FURB103.py.snap b/crates/ruff_linter/src/rules/refurb/snapshots/ruff_linter__rules__refurb__tests__preview_FURB103_FURB103.py.snap
index eef0992839..8148035435 100644
--- a/crates/ruff_linter/src/rules/refurb/snapshots/ruff_linter__rules__refurb__tests__preview_FURB103_FURB103.py.snap
+++ b/crates/ruff_linter/src/rules/refurb/snapshots/ruff_linter__rules__refurb__tests__preview_FURB103_FURB103.py.snap
@@ -257,4 +257,25 @@ help: Replace with `Path("file.txt").write_text(foobar, newline="\r\n")`
 75 + pathlib.Path("file.txt").write_text(foobar, newline="\r\n")
 76 | 
 77 | # Non-errors.
-78 |
+78 | 
+
+FURB103 [*] `open` and `write` should be replaced by `Path("test.json")....`
+   --> FURB103.py:154:6
+    |
+152 | data = {"price": 100}
+153 |
+154 | with open("test.json", "wb") as f:
+    |      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+155 |     f.write(json.dumps(data, indent=4).encode("utf-8"))
+    |
+help: Replace with `Path("test.json")....`
+148 | 
+149 | # See: https://github.com/astral-sh/ruff/issues/20785
+150 | import json
+151 + import pathlib
+152 | 
+153 | data = {"price": 100}
+154 | 
+    - with open("test.json", "wb") as f:
+    -     f.write(json.dumps(data, indent=4).encode("utf-8"))
+155 + pathlib.Path("test.json").write_bytes(json.dumps(data, indent=4).encode("utf-8"))
diff --git a/crates/ruff_linter/src/rules/refurb/snapshots/ruff_linter__rules__refurb__tests__write_whole_file_python_39.snap b/crates/ruff_linter/src/rules/refurb/snapshots/ruff_linter__rules__refurb__tests__write_whole_file_python_39.snap
index 81eea0c159..140a274468 100644
--- a/crates/ruff_linter/src/rules/refurb/snapshots/ruff_linter__rules__refurb__tests__write_whole_file_python_39.snap
+++ b/crates/ruff_linter/src/rules/refurb/snapshots/ruff_linter__rules__refurb__tests__write_whole_file_python_39.snap
@@ -104,3 +104,14 @@ FURB103 `open` and `write` should be replaced by `Path("file.txt").write_text(ba
 51 |     # writes a single time to file and that bit they can replace.
    |
 help: Replace with `Path("file.txt").write_text(bar(bar(a + x)))`
+
+FURB103 `open` and `write` should be replaced by `Path("test.json")....`
+   --> FURB103.py:154:6
+    |
+152 | data = {"price": 100}
+153 |
+154 | with open("test.json", "wb") as f:
+    |      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+155 |     f.write(json.dumps(data, indent=4).encode("utf-8"))
+    |
+help: Replace with `Path("test.json")....`
diff --git a/crates/ruff_python_ast/src/nodes.rs b/crates/ruff_python_ast/src/nodes.rs
index f71f420d09..5cb58e7f05 100644
--- a/crates/ruff_python_ast/src/nodes.rs
+++ b/crates/ruff_python_ast/src/nodes.rs
@@ -3372,7 +3372,7 @@ impl Arguments {
     pub fn arguments_source_order(&self) -> impl Iterator<Item = ArgOrKeyword<'_>> {
         let args = self.args.iter().map(ArgOrKeyword::Arg);
         let keywords = self.keywords.iter().map(ArgOrKeyword::Keyword);
-        args.merge_by(keywords, |left, right| left.start() < right.start())
+        args.merge_by(keywords, |left, right| left.start() <= right.start())
     }
 
     pub fn inner_range(&self) -> TextRange {