diff --git a/promql/promqltest/test.go b/promql/promqltest/test.go
index 1773b6341..4d12dead9 100644
--- a/promql/promqltest/test.go
+++ b/promql/promqltest/test.go
@@ -838,7 +838,7 @@ func (ev *evalCmd) compareResult(result parser.Value) error {
 }
 
 // compareNativeHistogram is helper function to compare two native histograms
-// which can tolerate some differ in the field of float type, such as Count, Sum
+// which can tolerate some differ in the field of float type, such as Count, Sum.
 func compareNativeHistogram(exp, cur *histogram.FloatHistogram) bool {
 	if exp == nil || cur == nil {
 		return false
diff --git a/util/almost/almost.go b/util/almost/almost.go
index e0b5acb82..a40462658 100644
--- a/util/almost/almost.go
+++ b/util/almost/almost.go
@@ -25,7 +25,7 @@ var minNormal = math.Float64frombits(0x0010000000000000) // The smallest positiv
 // multiplied by epsilon.
 func Equal(a, b, epsilon float64) bool {
 	// StaleNaN is a special value that is used as staleness maker, so
-	// the two values are equal when both are exactly equals to stale NaN
+	// the two values are equal when both are exactly equals to stale NaN.
 	if value.IsStaleNaN(a) || value.IsStaleNaN(b) {
 		return value.IsStaleNaN(a) && value.IsStaleNaN(b)
 	}