diff --git a/src/cli/gentest/source_code_generator.py b/src/cli/gentest/source_code_generator.py
index b6b0ae8cb90..8da2bef155a 100644
--- a/src/cli/gentest/source_code_generator.py
+++ b/src/cli/gentest/source_code_generator.py
@@ -67,17 +67,24 @@ def format_code(code: str) -> str:
         # Create a Path object for the input file
         input_file_path = Path(temp_file.name)
 
-        # Get the path to the black executable in the virtual environment
+        # Get the path to the formatter executable in the virtual environment
         if sys.platform.startswith("win"):
-            black_path = Path(sys.prefix) / "Scripts" / "black.exe"
+            formatter_path = Path(sys.prefix) / "Scripts" / "ruff.exe"
         else:
-            black_path = Path(sys.prefix) / "bin" / "black"
+            formatter_path = Path(sys.prefix) / "bin" / "ruff"
 
-        # Call black to format the file
+        # Call ruff to format the file
         config_path = Path(sys.prefix).parent / "pyproject.toml"
 
         subprocess.run(
-            [str(black_path), str(input_file_path), "--quiet", "--config", str(config_path)],
+            [
+                str(formatter_path),
+                "format",
+                str(input_file_path),
+                "--quiet",
+                "--config",
+                str(config_path),
+            ],
             check=True,
         )
 
diff --git a/src/cli/gentest/templates/blockchain_test/transaction.py.j2 b/src/cli/gentest/templates/blockchain_test/transaction.py.j2
index f19836c41a4..ef192d37c07 100644
--- a/src/cli/gentest/templates/blockchain_test/transaction.py.j2
+++ b/src/cli/gentest/templates/blockchain_test/transaction.py.j2
@@ -1,7 +1,7 @@
 """
 Gentest autogenerated test from `tx.hash`:
 {{ tx_hash }}
-https://etherscan.io/tx/{{tx_hash}}
+https://etherscan.io/tx/{{tx_hash}}.
 """
 
 from typing import Dict
@@ -25,7 +25,7 @@ def test_transaction_{{ tx_hash }}(
 ):
     """
     Gentest autogenerated test for tx.hash:
-    {{ tx_hash }}
+    {{ tx_hash }}.
     """
     pre = {{ pre_state | stringify }}