diff --git a/Makefile b/Makefile
index 546ed14..fce167c 100644
--- a/Makefile
+++ b/Makefile
@@ -131,10 +131,7 @@ mem: clean
 	go tool pprof -lines -web -alloc_space *.test mem.out
 
 memgrind:
-	GO111MODULE=off go test -v -timeout 24h -tags libc.memgrind -xtags=libc.memgrind
-
-memgrind:
-	go test -v -timeout 24h -tags=libc.memgrind,cgobench -run Test[^T][^c][^l] -bench . -recs_per_sec_as_mbps 2>&1 | tee log-memgrind
+	go test -v -timeout 24h -tags libc.memgrind,cgobench -bench . -suite extraquick -xtags=libc.memgrind
 
 regression_base_release:
 	GO111MODULE=on go test -v -timeout 24h -tags=cgobench -run @ -bench '(Reading1|InsertComparative)/sqlite[^3]' -recs_per_sec_as_mbps 2>&1 | tee log-regression-base
diff --git a/cgo_test.go b/cgo_test.go
index 0f67e5d..ae80753 100644
--- a/cgo_test.go
+++ b/cgo_test.go
@@ -14,7 +14,6 @@ import (
 	"testing"
 
 	_ "github.com/mattn/go-sqlite3"
-	"modernc.org/libc"
 )
 
 const gcoDriver = "sqlite3"
diff --git a/go.mod b/go.mod
index 72227fc..b1e0681 100644
--- a/go.mod
+++ b/go.mod
@@ -4,7 +4,7 @@ go 1.15
 
 require (
 	github.com/mattn/go-sqlite3 v1.14.6
-	modernc.org/libc v0.0.0-20210217173042-ace5bf44f22f
+	modernc.org/libc v0.0.0-20210217213903-244f02c059c0
 	modernc.org/mathutil v1.2.2
-	modernc.org/tcl v0.0.0-20210217173959-693baba442b7
+	modernc.org/tcl v0.0.0-20210217214212-ee0aa120619d
 )
diff --git a/go.sum b/go.sum
index 722336b..be75ccd 100644
--- a/go.sum
+++ b/go.sum
@@ -9,13 +9,13 @@ golang.org/x/sys v0.0.0-20201126233918-771906719818 h1:f1CIuDlJhwANEC2MM87MBEVMr
 golang.org/x/sys v0.0.0-20201126233918-771906719818/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 modernc.org/httpfs v1.0.2 h1:4aw8F68gTwx7FWL/vEMjm/XaPwPL16MItkF/P9ziEPY=
 modernc.org/httpfs v1.0.2/go.mod h1:7dosgurJGp0sPaRanU53W4xZYKh14wfzX420oZADeHM=
-modernc.org/libc v0.0.0-20210217173042-ace5bf44f22f h1:KpQ4RCk1PyU+5P/g8YFfUvWAdYgc8dNwPLn1fl68NNw=
-modernc.org/libc v0.0.0-20210217173042-ace5bf44f22f/go.mod h1:U1eq8YWr/Kc1RWCMFUWEdkTg8OTcfLw2kY8EDwl039w=
+modernc.org/libc v0.0.0-20210217213903-244f02c059c0 h1:rpybsAFmoW9BAIBT5UfczUfP9Rq4kvNO+1XeI+rOlSs=
+modernc.org/libc v0.0.0-20210217213903-244f02c059c0/go.mod h1:U1eq8YWr/Kc1RWCMFUWEdkTg8OTcfLw2kY8EDwl039w=
 modernc.org/mathutil v1.1.1 h1:FeylZSVX8S+58VsyJlkEj2bcpdytmp9MmDKZkKx8OIE=
 modernc.org/mathutil v1.1.1/go.mod h1:mZW8CKdRPY1v87qxC/wUdX5O1qDzXMP5TH3wjfpga6E=
 modernc.org/mathutil v1.2.2 h1:+yFk8hBprV+4c0U9GjFtL+dV3N8hOJ8JCituQcMShFY=
 modernc.org/mathutil v1.2.2/go.mod h1:mZW8CKdRPY1v87qxC/wUdX5O1qDzXMP5TH3wjfpga6E=
 modernc.org/memory v1.0.4 h1:utMBrFcpnQDdNsmM6asmyH/FM9TqLPS7XF7otpJmrwM=
 modernc.org/memory v1.0.4/go.mod h1:nV2OApxradM3/OVbs2/0OsP6nPfakXpi50C7dcoHXlc=
-modernc.org/tcl v0.0.0-20210217173959-693baba442b7 h1:lEZA6Oqu4pFUd5lbhtxtBOoengBdHco+Y+BvCCmfoPg=
-modernc.org/tcl v0.0.0-20210217173959-693baba442b7/go.mod h1:rhl17/YyI3O0rqM7iL26itCedrmuuXIDNvcinbsnLKM=
+modernc.org/tcl v0.0.0-20210217214212-ee0aa120619d h1:o58gI9Zp0nHaiIfjmQpNVaGPC809HhS0NniF+Ybe278=
+modernc.org/tcl v0.0.0-20210217214212-ee0aa120619d/go.mod h1:elJXjEdB68/mF4pZwpWYLwv89lYlk/Yc/5lJNa7F5VM=