diff --git a/report/metrics.go b/report/metrics.go
index da11215e0..e5a83c20b 100644
--- a/report/metrics.go
+++ b/report/metrics.go
@@ -104,18 +104,6 @@ func (m Metric) Copy() Metric {
 	return c
 }
 
-// WithFirst returns a fresh copy of m, with first set to t.
-// TODO: This seems to be unused
-func (m Metric) WithFirst(t time.Time) Metric {
-	return Metric{
-		Samples: m.Samples,
-		Max:     m.Max,
-		Min:     m.Min,
-		First:   t,
-		Last:    m.Last,
-	}
-}
-
 // WithMax returns a fresh copy of m, with Max set to max
 func (m Metric) WithMax(max float64) Metric {
 	return Metric{
diff --git a/test/fixture/report_fixture.go b/test/fixture/report_fixture.go
index fa1110e20..9296d0acc 100644
--- a/test/fixture/report_fixture.go
+++ b/test/fixture/report_fixture.go
@@ -101,22 +101,22 @@ var (
 	ServiceUID          = "service1234"
 	ServiceNodeID       = report.MakeServiceNodeID(ServiceUID)
 
-	ClientProcess1CPUMetric    = report.MakeSingletonMetric(Now, 0.01).WithFirst(Now.Add(-1 * time.Second))
-	ClientProcess1MemoryMetric = report.MakeSingletonMetric(Now, 0.02).WithFirst(Now.Add(-2 * time.Second))
+	ClientProcess1CPUMetric    = report.MakeSingletonMetric(Now.Add(-1*time.Second), 0.01)
+	ClientProcess1MemoryMetric = report.MakeSingletonMetric(Now.Add(-2*time.Second), 0.02)
 
-	ClientContainerCPUMetric    = report.MakeSingletonMetric(Now, 0.03).WithFirst(Now.Add(-3 * time.Second))
-	ClientContainerMemoryMetric = report.MakeSingletonMetric(Now, 0.04).WithFirst(Now.Add(-4 * time.Second))
+	ClientContainerCPUMetric    = report.MakeSingletonMetric(Now.Add(-3*time.Second), 0.03)
+	ClientContainerMemoryMetric = report.MakeSingletonMetric(Now.Add(-4*time.Second), 0.04)
 
-	ServerContainerCPUMetric    = report.MakeSingletonMetric(Now, 0.05).WithFirst(Now.Add(-5 * time.Second))
-	ServerContainerMemoryMetric = report.MakeSingletonMetric(Now, 0.06).WithFirst(Now.Add(-6 * time.Second))
+	ServerContainerCPUMetric    = report.MakeSingletonMetric(Now.Add(-5*time.Second), 0.05)
+	ServerContainerMemoryMetric = report.MakeSingletonMetric(Now.Add(-6*time.Second), 0.06)
 
-	ClientHostCPUMetric    = report.MakeSingletonMetric(Now, 0.07).WithFirst(Now.Add(-7 * time.Second))
-	ClientHostMemoryMetric = report.MakeSingletonMetric(Now, 0.08).WithFirst(Now.Add(-8 * time.Second))
-	ClientHostLoad1Metric  = report.MakeSingletonMetric(Now, 0.09).WithFirst(Now.Add(-9 * time.Second))
+	ClientHostCPUMetric    = report.MakeSingletonMetric(Now.Add(-7*time.Second), 0.07)
+	ClientHostMemoryMetric = report.MakeSingletonMetric(Now.Add(-8*time.Second), 0.08)
+	ClientHostLoad1Metric  = report.MakeSingletonMetric(Now.Add(-9*time.Second), 0.09)
 
-	ServerHostCPUMetric    = report.MakeSingletonMetric(Now, 0.12).WithFirst(Now.Add(-12 * time.Second))
-	ServerHostMemoryMetric = report.MakeSingletonMetric(Now, 0.13).WithFirst(Now.Add(-13 * time.Second))
-	ServerHostLoad1Metric  = report.MakeSingletonMetric(Now, 0.14).WithFirst(Now.Add(-14 * time.Second))
+	ServerHostCPUMetric    = report.MakeSingletonMetric(Now.Add(-12*time.Second), 0.12)
+	ServerHostMemoryMetric = report.MakeSingletonMetric(Now.Add(-13*time.Second), 0.13)
+	ServerHostLoad1Metric  = report.MakeSingletonMetric(Now.Add(-14*time.Second), 0.14)
 
 	Report = report.Report{
 		ID: "test-report",