diff --git a/overreact/_cli.py b/overreact/_cli.py
index 4c9ba55e..1deea55c 100644
--- a/overreact/_cli.py
+++ b/overreact/_cli.py
@@ -738,7 +738,7 @@ def main(arguments=None):
     )
     parser.add_argument(
         "path",
-        help="path to a source (`.k`) or compiled (.jk) model input file (if a source "
+        help="path to a source (`.k`) or compiled (`.jk`) model input file (if a source "
         "input file is given, but there is a compiled file available, the compiled "
         "file will be used; use --compile|-c to force recompilation of the "
         "source input file instead)",
@@ -766,7 +766,7 @@ def main(arguments=None):
         "--compile",
         # TODO(schneiderfelipe): should we consider --compile|-c always as a
         # do-nothing (no analysis)?
-        help="force recompile a source (`.k`) into a compiled (.jk) model input file",
+        help="force recompile a source (`.k`) into a compiled (`.jk`) model input file",
         action="store_true",
     )
     parser.add_argument(
diff --git a/overreact/io.py b/overreact/io.py
index ec4fc26d..11bd1843 100644
--- a/overreact/io.py
+++ b/overreact/io.py
@@ -47,7 +47,7 @@ def parse_model(path: Text, force_compile: bool = False):
     ----------
     path : str
         Path to the model or source input file.
-        If the final extension is not ``.jk`` or ``.k``, it is guessed.
+        If the final extension is not `.jk` or `.k`, it is guessed.
     force_compile : bool
         If True, a `.k` file will take precedence over any `.jk` file for reading. A
         `.jk` file is thus either generated or overwritten. This is sometimes
@@ -96,22 +96,22 @@ def parse_model(path: Text, force_compile: bool = False):
     """
     if not path.endswith((".k", ".jk")):
         path = path + ".jk"
-        logger.warning(f"assuming .jk file in {path}")
+        logger.warning(f"assuming `.jk` file in {path}")
     name, _ = os.path.splitext(path)
 
     path_jk = name + ".jk"
     if not force_compile and os.path.isfile(path_jk):
-        logger.info(f"parsing .jk file in {path_jk}")
+        logger.info(f"parsing `.jk` file in {path_jk}")
         return _parse_model(path_jk)
 
     path_k = name + ".k"
-    logger.info(f"parsing .k file in {path_k}")
+    logger.info(f"parsing `.k` file in {path_k}")
     if not os.path.isfile(path_k):
-        raise FileNotFoundError(f"no .k file found in {path_k}")
+        raise FileNotFoundError(f"no `.k` file found in {path_k}")
 
     model = _parse_source(path_k)
     with open(path_jk, "w") as f:
-        logger.info(f"writing .jk file in {path_jk}")
+        logger.info(f"writing `.jk` file in {path_jk}")
         f.write(_unparse_model(model))
 
     return model
diff --git a/tests/test_cli.py b/tests/test_cli.py
index f0ecc7dd..66669cd4 100644
--- a/tests/test_cli.py
+++ b/tests/test_cli.py
@@ -6,21 +6,21 @@
 
 
 def test_cli_compiles_source_file(monkeypatch):
-    """Ensure the command-line interface can compile a source file (.k)."""
+    """Ensure the command-line interface can compile a source file (`.k`)."""
     params = ["overreact", "--compile", "data/ethane/B97-3c/model.k"]
     monkeypatch.setattr("sys.argv", params)
     cli.main()
 
 
 def test_cli_describes_source_file(monkeypatch):
-    """Ensure the command-line interface can describe a source file (.k)."""
+    """Ensure the command-line interface can describe a source file (`.k`)."""
     params = ["overreact", "data/ethane/B97-3c/model.k"]
     monkeypatch.setattr("sys.argv", params)
     cli.main()
 
 
 def test_cli_describes_model_file(monkeypatch):
-    """Ensure the command-line interface can describe a model file (.jk)."""
+    """Ensure the command-line interface can describe a model file (`.jk`)."""
     params = ["overreact", "data/ethane/B97-3c/model.jk"]
     monkeypatch.setattr("sys.argv", params)
     cli.main()