diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index b02116a0..b7cec813 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -57,10 +57,8 @@ jobs:
         os: [ubuntu-22.04]
         jdk: [24]
         include:
-          # FIXME
-          # Windows keep failing randomly because of CI issues.
-          # - os: windows-latest
-          #   jdk: 24
+          - os: windows-latest
+            jdk: 24
           - os: macos-latest
             jdk: 24
     steps:
diff --git a/integration-test/integration/chat/anthropic_test.clj b/integration-test/integration/chat/anthropic_test.clj
index da049a65..c124d687 100644
--- a/integration-test/integration/chat/anthropic_test.clj
+++ b/integration-test/integration/chat/anthropic_test.clj
@@ -230,7 +230,7 @@
                                             :origin "native"
                                             :id "tool-1"
                                             :name "eca_directory_tree"
-                                            :argumentsText (str "h\":\"" (h/project-path->canon-path "resources") "\"}")
+                                            :argumentsText (str "h\":\"" (h/json-escape-path (h/project-path->canon-path "resources")) "\"}")
                                             :summary "Listing file tree"})
         (match-content chat-id "system" {:type "usage"
                                          :sessionTokens 35
diff --git a/integration-test/integration/chat/commands_test.clj b/integration-test/integration/chat/commands_test.clj
index 5aeb54bc..5a6cae33 100644
--- a/integration-test/integration/chat/commands_test.clj
+++ b/integration-test/integration/chat/commands_test.clj
@@ -63,8 +63,11 @@
   (eca/request! (fixture/initialize-request
                  {:initializationOptions (merge fixture/default-init-options
                                                 {:mcpServers {"mcp-server-sample"
-                                                              {:command "bash"
-                                                               :args ["-c" (str "cd " h/mcp-server-sample-path " && clojure -M:server")]}}})}))
+                                                              (if h/windows?
+                                                                {:command "cmd.exe"
+                                                                 :args ["/c" (str "cd /d " h/mcp-server-sample-path " && clojure -M:server")]}
+                                                                {:command "bash"
+                                                                 :args ["-c" (str "cd " h/mcp-server-sample-path " && clojure -M:server")]})}})}))
   (eca/notify! (fixture/initialized-notification))
 
   (Thread/sleep 10000) ;; wait MCP server start TODO Improve this
diff --git a/integration-test/integration/chat/openai_test.clj b/integration-test/integration/chat/openai_test.clj
index 9679647f..8d637c59 100644
--- a/integration-test/integration/chat/openai_test.clj
+++ b/integration-test/integration/chat/openai_test.clj
@@ -275,7 +275,7 @@
                       {:type "function_call"
                        :name "eca_directory_tree"
                        :call_id "tool-1"
-                       :arguments (str "{\"path\":\"" (h/project-path->canon-path "resources") "\"}")}
+                       :arguments (str "{\"path\":\"" (h/json-escape-path (h/project-path->canon-path "resources")) "\"}")}
                       {:type "function_call_output"
                        :call_id "tool-1"
                        :output (str (h/project-path->canon-path "resources") "\n"
diff --git a/integration-test/integration/helper.clj b/integration-test/integration/helper.clj
index 8f60ee5c..b6e10598 100644
--- a/integration-test/integration/helper.clj
+++ b/integration-test/integration/helper.clj
@@ -45,6 +45,12 @@
     windows?
     (string/replace  #"/([a-zA-Z]):/" "/$1%3A/")))
 
+(defn json-escape-path
+  "Escapes the filesystem PATH string for safe use in JSON and returns the
+  result."
+  [path]
+  (string/replace path "\\" "\\\\"))
+
 (defn file->uri [file]
   (let [uri (-> file fs/canonicalize .toUri .toString)]
     (if *escape-uris?*
diff --git a/integration-test/llm_mock/anthropic.clj b/integration-test/llm_mock/anthropic.clj
index 7c277586..705504d4 100644
--- a/integration-test/llm_mock/anthropic.clj
+++ b/integration-test/llm_mock/anthropic.clj
@@ -180,7 +180,7 @@
                    {:type "content_block_delta"
                     :index 2
                     :delta {:type "input_json_delta"
-                            :partial_json (str "h\":\"" (h/project-path->canon-path "resources") "\"}")}})
+                            :partial_json (str "h\":\"" (h/json-escape-path (h/project-path->canon-path "resources")) "\"}")}})
         ;; Finish the message indicating a tool_use stop so the client triggers tools
         (sse-send! ch "message_delta"
                    {:type "message_delta"