diff --git a/test/sympto/fixtures.js b/test/sympto/fixtures.js
index ce096faec917fa2be2a939fc9db40f8c7cb2156a..69792d55894bada10a76ce67fc3049244f54f9d6 100644
--- a/test/sympto/fixtures.js
+++ b/test/sympto/fixtures.js
@@ -253,4 +253,26 @@ export const fhmOnDay15 = [
   { date: '2018-06-16', temperature: 36.9, mucus: 2 },
   { date: '2018-06-17', temperature: 36.9, mucus: 2 },
   { date: '2018-06-18', temperature: 36.9, mucus: 2 },
+].map(convertToSymptoFormat)
+
+export const mucusPeakSlightlyBeforeTempShift = [
+  { date: '2018-06-01', temperature: 36.6, bleeding: 2 },
+  { date: '2018-06-02', temperature: 36.65 },
+  { date: '2018-06-04', temperature: 36.6 },
+  { date: '2018-06-07', temperature: 36.4, mucus: 1 },
+  { date: '2018-06-08', temperature: 36.35, mucus: 2},
+  { date: '2018-06-09', temperature: 36.4, mucus: 2},
+  { date: '2018-06-10', temperature: 36.45, mucus: 2},
+  { date: '2018-06-11', temperature: 36.4, mucus: 3},
+  { date: '2018-06-12', temperature: 36.45, mucus: 3},
+  { date: '2018-06-13', temperature: 36.45, mucus: 4},
+  { date: '2018-06-14', temperature: 36.55, mucus: 3},
+  { date: '2018-06-15', temperature: 36.6, mucus: 3},
+  { date: '2018-06-16', temperature: 36.6, mucus: 3},
+  { date: '2018-06-17', temperature: 36.55, mucus: 2},
+  { date: '2018-06-18', temperature: 36.6, mucus: 1},
+  { date: '2018-06-19', temperature: 36.7, mucus: 1},
+  { date: '2018-06-20', temperature: 36.75, mucus: 1},
+  { date: '2018-06-21', temperature: 36.8, mucus: 1},
+  { date: '2018-06-22', temperature: 36.8, mucus: 1}
 ].map(convertToSymptoFormat)
\ No newline at end of file
diff --git a/test/sympto/index.spec.js b/test/sympto/index.spec.js
index bbb66d49ccdc7901097ec31237654b7ae5ddd286..b9dcd9f9e8e8eaf938c883926210529ccb604858 100644
--- a/test/sympto/index.spec.js
+++ b/test/sympto/index.spec.js
@@ -15,7 +15,8 @@ import {
   mucusPeak5DaysAfterFhm,
   mucusPeakTwoDaysBeforeFhm,
   fhmOnDay12,
-  fhmOnDay15
+  fhmOnDay15,
+  mucusPeakSlightlyBeforeTempShift
 } from './fixtures'
 
 const expect = chai.expect
@@ -223,6 +224,40 @@ describe('sympto', () => {
       })
     })
 
+    it('another example for mucus peak before temp shift', () => {
+      const status = getSensiplanStatus({
+        cycle: mucusPeakSlightlyBeforeTempShift,
+        previousCycles: [cycleWithFhm]
+      })
+
+      expect(status.temperatureShift).to.be.an('object')
+      expect(status.mucusShift).to.be.an('object')
+      expect(status.assumeFertility).to.be.false()
+      expect(Object.keys(status.phases).length).to.eql(3)
+      expect(status.phases.preOvulatory).to.eql({
+        start: { date: '2018-06-01' },
+        end: { date: '2018-06-05' },
+        cycleDays: mucusPeakSlightlyBeforeTempShift
+          .filter(({date}) => date <= '2018-06-05')
+      })
+      expect(status.phases.periOvulatory).to.eql({
+        start: { date: '2018-06-06' },
+        end: { date: '2018-06-17', time: '18:00' },
+        cycleDays: mucusPeakSlightlyBeforeTempShift
+          .filter(({date}) => {
+            return date > '2018-06-05' && date <= '2018-06-17'
+          })
+      })
+      expect(status.phases.postOvulatory).to.eql({
+        start: {
+          date: '2018-06-17',
+          time: '18:00'
+        },
+        cycleDays: mucusPeakSlightlyBeforeTempShift
+          .filter(({date}) => date >= '2018-06-17')
+      })
+    })
+
     it('with another mucus peak 5 days after fHM ignores it', () => {
       const status = getSensiplanStatus({
         cycle: mucusPeak5DaysAfterFhm,