diff --git a/bolt.go b/bolt.go
index 366b77391..e679b1400 100644
--- a/bolt.go
+++ b/bolt.go
@@ -281,7 +281,7 @@ func (w *BoltWrapper) DeleteIndex(indexName string) error {
 	// index name in the key prefix, so we cannot allow indexNames
 	// themselves to contain apostrophies.
 	if strings.Contains(indexName, "/") {
-		return fmt.Errorf("error: bad indexName `%v` in BoltWrapper.DeleteIndex() call: indexName cannot contain '/'.", indexName)
+		return fmt.Errorf("error: bad indexName `%v` in BoltWrapper.DeleteIndex() call: indexName cannot contain '/'", indexName)
 	}
 	prefix := txkey.IndexOnlyPrefix(indexName)
 	return w.DeletePrefix(prefix)
diff --git a/rbf.go b/rbf.go
index e75e7768e..64a268281 100644
--- a/rbf.go
+++ b/rbf.go
@@ -542,7 +542,7 @@ func (w *RbfDBWrapper) DeleteField(index, field, fieldPath string) error {
 func (w *RbfDBWrapper) DeleteIndex(indexName string) error {
 
 	if strings.Contains(indexName, "'") {
-		return fmt.Errorf("error: bad indexName `%v` in RbfDBWrapper.DeleteIndex() call: indexName cannot contain apostrophes/single quotes.", indexName)
+		return fmt.Errorf("error: bad indexName `%v` in RbfDBWrapper.DeleteIndex() call: indexName cannot contain apostrophes/single quotes", indexName)
 	}
 	prefix := txkey.IndexOnlyPrefix(indexName)
 
diff --git a/time.go b/time.go
index b87774f1a..a35ba7dd4 100644
--- a/time.go
+++ b/time.go
@@ -257,16 +257,16 @@ func parsePartialTime(t string) (time.Time, error) {
 			// has minutes
 			minute, err = strconv.Atoi(subStrings[1])
 			if err != nil {
-				return -1, -1, errors.New("Invalid Time")
+				return -1, -1, errors.New("invalid time")
 			}
 			fallthrough
 		case 1:
 			hour, err = strconv.Atoi(subStrings[0])
 			if err != nil {
-				return -1, -1, errors.New("Invalid Time")
+				return -1, -1, errors.New("invalid time")
 			}
 		default:
-			return -1, -1, errors.New("Invalid Time")
+			return -1, -1, errors.New("invalid time")
 		}
 
 		return
@@ -282,7 +282,7 @@ func parsePartialTime(t string) (time.Time, error) {
 			return true
 		}
 		if len(subMatches) <= 1 {
-			return nil, errors.New("Invalid time")
+			return nil, errors.New("invalid time")
 		}
 		// ignore full match which is at index 0
 		subMatches = subMatches[1:] // ignore full match which is at index 0
@@ -295,7 +295,7 @@ func parsePartialTime(t string) (time.Time, error) {
 			} else {
 				// rest must be empty for date-time to be valid
 				if !restAreEmpty(subMatches[i:]) {
-					return nil, errors.New("Invalid date-time")
+					return nil, errors.New("invalid date-time")
 				}
 				break
 			}
diff --git a/txfactory.go b/txfactory.go
index 84742cd2e..93e9449df 100644
--- a/txfactory.go
+++ b/txfactory.go
@@ -1383,7 +1383,7 @@ func (f *TxFactory) greenHasData() (hasData bool, err error) {
 	case 2:
 		return f.dbPerShard.HasData(1)
 	}
-	err = fmt.Errorf("unsupported len(f.types): %v. Must be 1 or 2.", n)
+	err = fmt.Errorf("unsupported len(f.types): %v; must be 1 or 2", n)
 	PanicOn(err)
 	return
 }
@@ -1410,7 +1410,7 @@ func (f *TxFactory) green2blue(holder *Holder) (err0 error) {
 	greenSrc := f.types[1]
 
 	if blueDest == roaringTxn {
-		return fmt.Errorf("error: cannot migrate to 'roaring': not implemented.")
+		return fmt.Errorf("error: cannot migrate to 'roaring': not implemented")
 	}
 
 	idxs := holder.Indexes()
@@ -1427,13 +1427,13 @@ func (f *TxFactory) green2blue(holder *Holder) (err0 error) {
 		return errors.Wrap(err, "TxFactory.green2blue f.greenHasData()")
 	}
 	if !blueHasData && !greenHasData {
-		holder.Logger.Infof("no data in blue or green. No migration or verification to do.")
+		holder.Logger.Infof("no data in blue or green. No migration or verification to do")
 		return nil
 	}
 	// INVAR: blue has data.
 	if !greenHasData {
-		holder.Logger.Errorf("cannot migrate from green '%v' because it has no data in it.", greenSrc)
-		return fmt.Errorf("error: cannot migrate from green '%v' because it has no data in it.", greenSrc)
+		holder.Logger.Errorf("cannot migrate from green '%v' because it has no data in it", greenSrc)
+		return fmt.Errorf("error: cannot migrate from green '%v' because it has no data in it", greenSrc)
 	}
 
 	nGoro := runtime.NumCPU()