diff --git a/src/core/services/tool_call_handlers/pytest_full_suite_handler.py b/src/core/services/tool_call_handlers/pytest_full_suite_handler.py
index c15a82a6..aad48ce9 100644
--- a/src/core/services/tool_call_handlers/pytest_full_suite_handler.py
+++ b/src/core/services/tool_call_handlers/pytest_full_suite_handler.py
@@ -13,6 +13,7 @@
 
 import logging
 import re
+import shlex
 from dataclasses import dataclass
 from pathlib import Path
 from typing import Any
@@ -27,7 +28,20 @@
 
 
 # Matches commands invoking pytest (pytest, python -m pytest, py.test, etc.)
-_PYTEST_ROOT_PATTERN = re.compile(r"\b(pytest|py\.test)(?:\b|\.py\b)", re.IGNORECASE)
+_PYTEST_ROOT_PATTERN = re.compile(
+    r"^(pytest|py\.test)(?:$|\.py$|\.exe$|\.bat$)",
+    re.IGNORECASE,
+)
+
+
+def _token_invokes_pytest(token: str) -> bool:
+    """Return True when the token represents a pytest executable."""
+
+    if not token:
+        return False
+
+    executable_name = Path(token).name
+    return bool(_PYTEST_ROOT_PATTERN.fullmatch(executable_name))
 
 
 DEFAULT_STEERING_MESSAGE = (
@@ -91,6 +105,56 @@ def _normalize_whitespace(command: str) -> str:
     return " ".join(command.strip().split())
 
 
+def _split_command_tokens(command: str) -> list[str]:
+    try:
+        return shlex.split(command, posix=True)
+    except ValueError:
+        return command.split()
+
+
+def _command_invokes_pytest(command: str) -> bool:
+    tokens = _split_command_tokens(command)
+    if not tokens:
+        return False
+
+    separators = {"&&", ";", "||", "|"}
+    last_separator_index = -1
+
+    for index, token in enumerate(tokens):
+        if token in separators:
+            last_separator_index = index
+            continue
+
+        if not _token_invokes_pytest(token):
+            continue
+
+        segment_start = last_separator_index + 1
+        segment_tokens = tokens[segment_start : index + 1]
+
+        if _segment_represents_installation(segment_tokens[:-1]):
+            continue
+
+        return True
+
+    return False
+
+
+def _segment_represents_installation(tokens: list[str]) -> bool:
+    if not tokens:
+        return False
+
+    installation_keywords = {
+        "install",
+        "add",
+        "remove",
+        "uninstall",
+        "update",
+        "upgrade",
+    }
+
+    return any(token.lower() in installation_keywords for token in tokens)
+
+
 def _looks_like_full_suite(command: str) -> bool:
     """Determine if the pytest command targets the entire suite.
 
@@ -101,7 +165,7 @@ def _looks_like_full_suite(command: str) -> bool:
     """
 
     normalized = _normalize_whitespace(command)
-    if not _PYTEST_ROOT_PATTERN.search(normalized):
+    if not normalized:
         return False
 
     tokens = normalized.split()
@@ -110,7 +174,7 @@ def _looks_like_full_suite(command: str) -> bool:
     # Identify index where pytest command appears and inspect subsequent tokens.
     try:
         pytest_index = next(
-            i for i, tok in enumerate(tokens) if _PYTEST_ROOT_PATTERN.search(tok)
+            i for i, tok in enumerate(tokens) if _token_invokes_pytest(tok)
         )
     except StopIteration:
         return False
@@ -254,14 +318,16 @@ def _extract_pytest_command(self, context: ToolCallContext) -> str | None:
 
         command = _extract_command(arguments)
 
-        if normalized_tool_name in shell_tools:
+        if command and normalized_tool_name in shell_tools:
+            if not _command_invokes_pytest(command):
+                return None
             return command
 
         # Some providers map pytest directly as function name
-        if _PYTEST_ROOT_PATTERN.search(tool_name):
+        if _PYTEST_ROOT_PATTERN.fullmatch(tool_name):
             return command or tool_name
 
-        if command and _PYTEST_ROOT_PATTERN.search(command):
+        if command and _command_invokes_pytest(command):
             prefix = tool_name
             if prefix:
                 return f"{prefix} {command}".strip()
diff --git a/tests/unit/core/services/tool_call_handlers/test_pytest_full_suite_handler.py b/tests/unit/core/services/tool_call_handlers/test_pytest_full_suite_handler.py
index 11ddf82c..34665771 100644
--- a/tests/unit/core/services/tool_call_handlers/test_pytest_full_suite_handler.py
+++ b/tests/unit/core/services/tool_call_handlers/test_pytest_full_suite_handler.py
@@ -14,6 +14,8 @@
         ("pytest", True),
         ("python -m pytest", True),
         ("py.test", True),
+        ("./.venv/bin/pytest", True),
+        (r"C:\\venv\\Scripts\\pytest.exe", True),
         ("pytest -q", True),
         ("pytest --maxfail=1", True),
         ("pytest tests/unit", False),
@@ -22,6 +24,7 @@
         ("pytest some/test/path", False),
         ("pytest some/test/path::TestSuite::test_case", False),
         ("pytest tests.unit.test_example", False),
+        ("./.venv/bin/pytest tests/unit", False),
         ("pytest .", True),
         ("pytest ./tests", False),
     ],
@@ -143,6 +146,17 @@ async def test_handler_detects_list_based_command() -> None:
     assert result.should_swallow is True
 
 
+@pytest.mark.asyncio
+async def test_handler_detects_path_qualified_pytest_invocation() -> None:
+    handler = PytestFullSuiteHandler(enabled=True)
+    context = _build_context("./.venv/bin/pytest")
+
+    assert await handler.can_handle(context) is True
+    result = await handler.handle(context)
+
+    assert result.should_swallow is True
+
+
 @pytest.mark.asyncio
 async def test_handler_enabled_flag_controls_behavior() -> None:
     handler = PytestFullSuiteHandler(enabled=False)
@@ -184,3 +198,25 @@ async def test_handler_allows_targeted_python_pytest_invocation() -> None:
     result = await handler.handle(context)
 
     assert result.should_swallow is False
+
+
+@pytest.mark.asyncio
+async def test_handler_ignores_pytest_installation_commands() -> None:
+    handler = PytestFullSuiteHandler(enabled=True)
+    context = _build_context("pip install pytest")
+
+    assert await handler.can_handle(context) is False
+    result = await handler.handle(context)
+
+    assert result.should_swallow is False
+
+
+@pytest.mark.asyncio
+async def test_handler_ignores_pytest_plugin_installation() -> None:
+    handler = PytestFullSuiteHandler(enabled=True)
+    context = _build_context("pip install pytest-cov")
+
+    assert await handler.can_handle(context) is False
+    result = await handler.handle(context)
+
+    assert result.should_swallow is False