diff --git a/changelog.d/feature.98fc1e59.entry.yaml b/changelog.d/feature.98fc1e59.entry.yaml
new file mode 100644
index 0000000..01f6ce9
--- /dev/null
+++ b/changelog.d/feature.98fc1e59.entry.yaml
@@ -0,0 +1,5 @@
+message: Improve matching commands that contain quoted arguments.
+pr_ids:
+- 103
+timestamp: 1666456344
+type: feature
diff --git a/pytest_subprocess/utils.py b/pytest_subprocess/utils.py
index eece249..00edd49 100644
--- a/pytest_subprocess/utils.py
+++ b/pytest_subprocess/utils.py
@@ -1,4 +1,5 @@
 import os
+import shlex
 import sys
 import threading
 from pathlib import Path
@@ -38,8 +39,10 @@ def __init__(
         command: "COMMAND",
     ):
         if isinstance(command, str):
-            command = tuple(command.split(" "))
-        if not isinstance(command, (list, tuple)):
+            command = tuple(shlex.split(command))
+        if isinstance(command, list):
+            command = tuple(command)
+        elif not isinstance(command, tuple):
             raise TypeError("Command can be only of type string, list or tuple.")
 
         self.command: Tuple[ARGUMENT, ...] = tuple(
@@ -54,7 +57,9 @@ def __init__(
 
     def __eq__(self, other: AnyType) -> bool:
         if isinstance(other, str):
-            other = other.split(" ")
+            other = shlex.split(other)
+        elif isinstance(other, tuple):
+            other = list(other)
 
         norm_command = [
             os.fspath(c) if isinstance(c, os.PathLike) else c for c in self.command
diff --git a/tests/test_utils.py b/tests/test_utils.py
index c21fc15..f1515bb 100644
--- a/tests/test_utils.py
+++ b/tests/test_utils.py
@@ -31,6 +31,11 @@ def test_more_complex_command(command):
     assert check_not_match(command, ["other", "command"])
 
 
+def test_command_with_quoted_string():
+    command = Command(["something", "with", "an argument that contains spaces"])
+    assert command == 'something with "an argument that contains spaces"'
+
+
 def test_simple_wildcards():
     command = Command([Any()])
     assert check_match(command, ["test"])