diff --git a/ls.nim b/ls.nim
index aa12e35..ba2ad47 100644
--- a/ls.nim
+++ b/ls.nim
@@ -160,6 +160,8 @@ type
     nimDumpCache*: Table[string, NimbleDumpInfo] #path to NimbleDumpInfo
     entryPoints*: seq[string]
     responseMap*: TableRef[string, Future[JsonNode]]
+    testRunProcess*: Option[AsyncProcessRef] #There is only one test run process at a time
+
       #id to future. Represents the pending requests as result of calling ls.call
     srv*: RpcSocketServer
       #Both modes uses it to store the routes. Only actually started in socket mode
diff --git a/nimlangserver.nim b/nimlangserver.nim
index 728ade1..bfff2f3 100644
--- a/nimlangserver.nim
+++ b/nimlangserver.nim
@@ -68,6 +68,7 @@ proc registerRoutes(srv: RpcSocketServer, ls: LanguageServer) =
   srv.register("extension/runTask", wrapRpc(partial(runTask, ls)))
   srv.register("extension/listTests", wrapRpc(partial(listTests, ls)))
   srv.register("extension/runTests", wrapRpc(partial(runTests, ls)))
+  srv.register("extension/cancelTest", wrapRpc(partial(cancelTest, ls)))
   #Notifications
   srv.register("$/cancelRequest", wrapRpc(partial(cancelRequest, ls)))
   srv.register("initialized", wrapRpc(partial(initialized, ls)))
diff --git a/protocol/types.nim b/protocol/types.nim
index 4eb98a4..29ad822 100644
--- a/protocol/types.nim
+++ b/protocol/types.nim
@@ -1088,3 +1088,5 @@ type
     suites*: seq[RunTestSuiteResult]
     fullOutput*: string
 
+  CancelTestResult* = object
+    cancelled*: bool
diff --git a/routes.nim b/routes.nim
index fe65428..c802c41 100644
--- a/routes.nim
+++ b/routes.nim
@@ -869,7 +869,18 @@ proc runTests*(
     error "Nim path not found when running tests"
     return RunTestProjectResult()
   let workspaceRoot = ls.initializeParams.getRootPath
-  await runTests(params.entryPoint, nimPath.get(), params.suiteName, params.testNames.get(@[]), workspaceRoot)
+  await runTests(params.entryPoint, nimPath.get(), params.suiteName, params.testNames.get(@[]), workspaceRoot, ls)
+
+proc cancelTest*(
+    ls: LanguageServer, params: JsonNode
+): Future[CancelTestResult] {.async.} =
+  debug "Cancelling test"
+  if ls.testRunProcess.isSome: #No need to cancel the runTests request. The client should handle it.
+    await shutdownChildProcess(ls.testRunProcess.get)
+    ls.testRunProcess = none(AsyncProcessRef)
+    CancelTestResult(cancelled: true)
+  else:
+    CancelTestResult(cancelled: false)
 
 #Notifications
 proc initialized*(ls: LanguageServer, _: JsonNode): Future[void] {.async.} =
diff --git a/testrunner.nim b/testrunner.nim
index b75fd25..2d027ac 100644
--- a/testrunner.nim
+++ b/testrunner.nim
@@ -96,7 +96,8 @@ proc runTests*(
   nimPath: string, 
   suiteName: Option[string], 
   testNames: seq[string],
-  workspaceRoot: string
+  workspaceRoot: string,
+  ls: LanguageServer
 ): Future[RunTestProjectResult] {.async.} =
   var entryPoint = getFullPath(entryPoint, workspaceRoot)
   if not fileExists(entryPoint):
@@ -117,6 +118,7 @@ proc runTests*(
     stderrHandle = AsyncProcess.Pipe,
     stdoutHandle = AsyncProcess.Pipe,
   )
+  ls.testRunProcess = some(process)
   try:
     let res = await process.waitForExit(15.seconds)
     let processOutput = string.fromBytes(process.stdoutStream.read().await)
@@ -138,4 +140,5 @@ proc runTests*(
     error "Output from process", output = processOutput
   finally:
     await shutdownChildProcess(process)
-  
\ No newline at end of file
+    if ls.testRunProcess.isSome:
+      ls.testRunProcess = none(AsyncProcessRef)
\ No newline at end of file
diff --git a/tests/ttestrunner.nim b/tests/ttestrunner.nim
index b5113b0..8a66528 100644
--- a/tests/ttestrunner.nim
+++ b/tests/ttestrunner.nim
@@ -3,6 +3,7 @@ import std/[os, osproc, strscans, tables, sequtils, enumerate, strutils, options
 import testhelpers
 import testrunner
 import chronos
+import ls
 
 suite "Test Parser":
   test "should be able to list tests from an entry point":
@@ -36,7 +37,8 @@ suite "Test Parser":
 suite "Test Runner":
   test "should be able to run tests and retrieve results":
     let entryPoint = getCurrentDir() / "tests" / "projects" / "testrunner" / "tests" / "sampletests.nim"
-    let testProjectResult = waitFor runTests(entryPoint, "nim", none(string), @[], "")
+    let ls = LanguageServer()
+    let testProjectResult = waitFor runTests(entryPoint, "nim", none(string), @[], "", ls)
     check testProjectResult.suites.len == 4
     check testProjectResult.suites[0].name == "Sample Tests"
     check testProjectResult.suites[0].tests == 1