diff --git a/src/adapter.js b/src/adapter.js
index 41b7e94..61280ba 100644
--- a/src/adapter.js
+++ b/src/adapter.js
@@ -161,6 +161,7 @@ function KarmaReporter (tc, jasmineEnv) {
   // Save link on native Date object
   // because user can mock it
   var _Date = Date
+  var startTimeCurrentSpec = new _Date().getTime()
 
   /**
    * @param suite
@@ -233,8 +234,8 @@ function KarmaReporter (tc, jasmineEnv) {
     currentSuite = currentSuite.parent
   }
 
-  this.specStarted = function (specResult) {
-    specResult.startTime = new _Date().getTime()
+  this.specStarted = function () {
+    startTimeCurrentSpec = new _Date().getTime()
   }
 
   this.specDone = function (specResult) {
@@ -249,7 +250,7 @@ function KarmaReporter (tc, jasmineEnv) {
       pending: specResult.status === 'pending',
       success: specResult.failedExpectations.length === 0,
       suite: [],
-      time: skipped ? 0 : new _Date().getTime() - specResult.startTime,
+      time: skipped ? 0 : new _Date().getTime() - startTimeCurrentSpec,
       executedExpectationsCount: specResult.failedExpectations.length + specResult.passedExpectations.length
     }
 
diff --git a/test/adapter.spec.js b/test/adapter.spec.js
index c8483e9..1920a91 100644
--- a/test/adapter.spec.js
+++ b/test/adapter.spec.js
@@ -262,8 +262,8 @@ describe('jasmine adapter', function () {
         expect(result.time).toBe(1) // 4 - 3
       })
 
-      reporter.specStarted(spec.result)
-      reporter.specDone(spec.result)
+      reporter.specStarted(Object.assign({}, spec.result))
+      reporter.specDone(Object.assign({}, spec.result))
 
       expect(karma.result).toHaveBeenCalled()
     })