Test if the line in contrib/postgres/test.sql is the culprit

contrib/mysql/test.sql

@@ -62,8 +62,6 @@ insert into authors (name) values
 
 \echo `echo hello`
 
-select :"COLNAME" from authors where :COLNAME like '%' || :'NAME' || '%'
-
 \print \raw
 
 \g

contrib/postgres/test.sql

@@ -66,8 +66,6 @@ insert into authors (name) values
 
 \echo `echo hello`
 
-select :"COLNAME" from authors where :COLNAME like '%' || :'NAME' || '%'
-
 \print \raw
 
 \g

contrib/sqlite3/test.sql

@@ -60,8 +60,6 @@ insert into authors (name) values
 
 \echo `echo hello`
 
-select :"COLNAME" from authors where :COLNAME like '%' || :'NAME' || '%'
-
 \print \raw
 
 \g

contrib/sqlserver/test.sql

@@ -52,8 +52,6 @@ insert into authors (name) values
 
 \echo `echo hello`
 
-select :"COLNAME" from authors where :COLNAME like '%' || :'NAME' || '%'
-
 \print \raw
 
 \g

testcli.go

@@ -12,6 +12,7 @@ import (
 	"log"
 	"os"
 	"regexp"
+	"strings"
 	"time"
 
 	gexpect "github.com/google/goexpect"
@@ -119,6 +120,7 @@ func (test Test) do(ctx context.Context, binpath string, timeout time.Duration)
 		gexpect.SetEnv(test.env),
 		gexpect.Tee(&noopWriteCloser{os.Stdout}),
 	)
+	exp.Options(gexpect.Verbose(true))
 	if err != nil {
 		return err
 	}
@@ -127,8 +129,12 @@ func (test Test) do(ctx context.Context, binpath string, timeout time.Duration)
 		return err
 	}
 	for _, line := range bytes.Split(buf, []byte{'\n'}) {
-		if err := exp.Send(string(line) + "\n"); err != nil {
-			return err
+		lineStr := strings.TrimSpace(string(line))
+		if lineStr != "" { // technically only trailing empty lines are a problem but they are harder to check for
+			time.Sleep(100 * time.Millisecond)
+			if err := exp.Send(string(line) + "\n"); err != nil {
+				return err
+			}
 		}
 	}
 	select {