diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 068be9acd..95b449726 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -1,4 +1,9 @@
 repos:
+  - repo: https://github.com/pycqa/isort
+    rev: 5.12.0
+    hooks:
+      - id: isort
+        args: ["--profile", "black"]
   - repo: https://github.com/psf/black
     rev: 23.3.0
     hooks:
@@ -9,8 +14,3 @@ repos:
     hooks:
       - id: flake8
         args: ["--show-source"]
-  - repo: https://github.com/pycqa/isort
-    rev: 5.12.0
-    hooks:
-      - id: isort
-        args: ["--profile", "black"]
diff --git a/aider/repomap.py b/aider/repomap.py
index 35ba01f58..631024a19 100644
--- a/aider/repomap.py
+++ b/aider/repomap.py
@@ -10,8 +10,7 @@ import tiktoken
 
 from aider import prompts, utils
 
-# Global cache for tags
-TAGS_CACHE = {}
+# from aider.dump import dump
 
 
 def to_tree(tags):
@@ -50,12 +49,15 @@ def fname_to_components(fname, with_colon):
 
 class RepoMap:
     ctags_cmd = ["ctags", "--fields=+S", "--extras=-F", "--output-format=json"]
+    TAGS_CACHE = None
 
     def __init__(self, use_ctags=None, root=None, main_model="gpt-4"):
         if not root:
             root = os.getcwd()
         self.root = root
 
+        self.TAGS_CACHE = dict()
+
         if use_ctags is None:
             self.use_ctags = self.check_for_ctags()
         else:
@@ -136,8 +138,8 @@ class RepoMap:
         # Check if the file is in the cache and if the modification time has not changed
         file_mtime = os.path.getmtime(filename)
         cache_key = filename
-        if cache_key in TAGS_CACHE and TAGS_CACHE[cache_key]["mtime"] == file_mtime:
-            return TAGS_CACHE[cache_key]["data"]
+        if cache_key in self.TAGS_CACHE and self.TAGS_CACHE[cache_key]["mtime"] == file_mtime:
+            return self.TAGS_CACHE[cache_key]["data"]
 
         cmd = self.ctags_cmd + [filename]
         output = subprocess.check_output(cmd).decode("utf-8")
@@ -146,7 +148,7 @@ class RepoMap:
         data = [json.loads(line) for line in output]
 
         # Update the cache
-        TAGS_CACHE[cache_key] = {"mtime": file_mtime, "data": data}
+        self.TAGS_CACHE[cache_key] = {"mtime": file_mtime, "data": data}
         return data
 
     def get_tags(self, filename):