diff --git a/ql/test/library-tests/semmle/go/GoModExpr/ExcludeLines.expected b/ql/test/library-tests/semmle/go/GoModExpr/ExcludeLines.expected
new file mode 100644
index 00000000000..d23727f1726
--- /dev/null
+++ b/ql/test/library-tests/semmle/go/GoModExpr/ExcludeLines.expected
@@ -0,0 +1,3 @@
+| pkg1/go.mod:10:1:10:44 | go.mod exclude line | module | github.com/github/codeql-go | v1.23.1 |
+| pkg2/go.mod:14:2:14:35 | go.mod exclude line | module | github.com/sirupsen/logrus | v1.4.2 |
+| pkg2/go.mod:15:2:15:37 | go.mod exclude line | module | github.com/github/codeql-go | v1.23.1 |
diff --git a/ql/test/library-tests/semmle/go/GoModExpr/ExcludeLines.ql b/ql/test/library-tests/semmle/go/GoModExpr/ExcludeLines.ql
new file mode 100644
index 00000000000..dfd2262b9b7
--- /dev/null
+++ b/ql/test/library-tests/semmle/go/GoModExpr/ExcludeLines.ql
@@ -0,0 +1,5 @@
+import go
+
+from GoModExcludeLine excl, GoModModuleLine mod
+where excl.getFile() = mod.getFile()
+select excl, mod.getPath(), excl.getPath(), excl.getVer()
diff --git a/ql/test/library-tests/semmle/go/GoModExpr/ReplaceLines.expected b/ql/test/library-tests/semmle/go/GoModExpr/ReplaceLines.expected
new file mode 100644
index 00000000000..e69de29bb2d
diff --git a/ql/test/library-tests/semmle/go/GoModExpr/ReplaceLines.ql b/ql/test/library-tests/semmle/go/GoModExpr/ReplaceLines.ql
new file mode 100644
index 00000000000..0e82e2eea9d
--- /dev/null
+++ b/ql/test/library-tests/semmle/go/GoModExpr/ReplaceLines.ql
@@ -0,0 +1,11 @@
+import go
+
+from GoModReplaceLine repl, GoModModuleLine mod, string repVer
+where
+  repl.getFile() = mod.getFile() and
+  (
+    repVer = repl.getReplacementVer() or
+    repVer = "no version"
+  )
+select repl, mod.getPath(), repl.getOriginalPath(), repl.getReplacementPath(),
+  repl.getReplacementVer()
diff --git a/ql/test/library-tests/semmle/go/GoModExpr/RequireLines.expected b/ql/test/library-tests/semmle/go/GoModExpr/RequireLines.expected
new file mode 100644
index 00000000000..df5da59bc87
--- /dev/null
+++ b/ql/test/library-tests/semmle/go/GoModExpr/RequireLines.expected
@@ -0,0 +1,5 @@
+| pkg1/go.mod:6:2:6:67 | go.mod require line | module | github.com/github/codeql-go | v1.23.2-0.20200302182241-5e71a04fdf30 |
+| pkg1/go.mod:7:2:7:55 | go.mod require line | module | golang.org/x/tools | v0.0.0-20200109174759-ac4f524c1612 |
+| pkg2/go.mod:7:1:7:38 | go.mod require line | module | github.com/gorilla/mux | v1.7.4 |
+| pkg2/go.mod:9:2:9:35 | go.mod require line | module | github.com/sirupsen/logrus | v1.4.1 |
+| pkg2/go.mod:10:2:10:40 | go.mod require line | module | github.com/Masterminds/squirrel | v1.2.0 |
diff --git a/ql/test/library-tests/semmle/go/GoModExpr/RequireLines.ql b/ql/test/library-tests/semmle/go/GoModExpr/RequireLines.ql
new file mode 100644
index 00000000000..84854191b65
--- /dev/null
+++ b/ql/test/library-tests/semmle/go/GoModExpr/RequireLines.ql
@@ -0,0 +1,5 @@
+import go
+
+from GoModRequireLine req, GoModModuleLine mod
+where req.getFile() = mod.getFile()
+select req, mod.getPath(), req.getPath(), req.getVer()
diff --git a/ql/test/library-tests/semmle/go/GoModExpr/pkg1/go.mod b/ql/test/library-tests/semmle/go/GoModExpr/pkg1/go.mod
new file mode 100644
index 00000000000..3416d3f0204
--- /dev/null
+++ b/ql/test/library-tests/semmle/go/GoModExpr/pkg1/go.mod
@@ -0,0 +1,10 @@
+module codeql-go-tests/gomod/dep1
+
+go 1.14
+
+require (
+	github.com/github/codeql-go v1.23.2-0.20200302182241-5e71a04fdf30
+	golang.org/x/tools v0.0.0-20200109174759-ac4f524c1612
+)
+
+exclude github.com/github/codeql-go v1.23.1
diff --git a/ql/test/library-tests/semmle/go/GoModExpr/pkg1/pkg1.go b/ql/test/library-tests/semmle/go/GoModExpr/pkg1/pkg1.go
new file mode 100644
index 00000000000..e071a1255a5
--- /dev/null
+++ b/ql/test/library-tests/semmle/go/GoModExpr/pkg1/pkg1.go
@@ -0,0 +1,16 @@
+package pkg1
+
+import (
+	"fmt"
+
+	"github.com/github/codeql-go/extractor/dbscheme"
+	"github.com/github/codeql-go/extractor/trap"
+	"golang.org/x/tools/go/packages"
+)
+
+func usePkgs() {
+	fmt.Println(packages.NeedImports)
+	fmt.Println(dbscheme.LabelObjectType.Index())
+	var lbl trap.Label
+	fmt.Println(lbl)
+}
diff --git a/ql/test/library-tests/semmle/go/GoModExpr/pkg2/go.mod b/ql/test/library-tests/semmle/go/GoModExpr/pkg2/go.mod
new file mode 100644
index 00000000000..db778428e12
--- /dev/null
+++ b/ql/test/library-tests/semmle/go/GoModExpr/pkg2/go.mod
@@ -0,0 +1,16 @@
+module codeql-go-tests/gomod/dep2
+
+go 1.14
+
+replace github.com/Masterminds/squirrel => ../squirrel
+
+require github.com/gorilla/mux v1.7.4
+require (
+	github.com/sirupsen/logrus v1.4.1
+	github.com/Masterminds/squirrel v1.2.0
+)
+
+exclude (
+	github.com/sirupsen/logrus v1.4.2
+	github.com/github/codeql-go v1.23.1
+)
diff --git a/ql/test/library-tests/semmle/go/GoModExpr/pkg2/pkg2.go b/ql/test/library-tests/semmle/go/GoModExpr/pkg2/pkg2.go
new file mode 100644
index 00000000000..16c3a325211
--- /dev/null
+++ b/ql/test/library-tests/semmle/go/GoModExpr/pkg2/pkg2.go
@@ -0,0 +1,13 @@
+package pkg2
+
+import (
+	"fmt"
+
+	"github.com/Masterminds/squirrel"
+	"github.com/gorilla/mux"
+	"github.com/sirupsen/logrus"
+)
+
+func useDeps() {
+
+}
diff --git a/ql/test/library-tests/semmle/go/GoModExpr/squirrel/LICENSE b/ql/test/library-tests/semmle/go/GoModExpr/squirrel/LICENSE
new file mode 100644
index 00000000000..74c20a2b970
--- /dev/null
+++ b/ql/test/library-tests/semmle/go/GoModExpr/squirrel/LICENSE
@@ -0,0 +1,23 @@
+Squirrel
+The Masterminds
+Copyright (C) 2014-2015, Lann Martin
+Copyright (C) 2015-2016, Google
+Copyright (C) 2015, Matt Farina and Matt Butcher
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
diff --git a/ql/test/library-tests/semmle/go/GoModExpr/squirrel/README.md b/ql/test/library-tests/semmle/go/GoModExpr/squirrel/README.md
new file mode 100644
index 00000000000..d51962ba840
--- /dev/null
+++ b/ql/test/library-tests/semmle/go/GoModExpr/squirrel/README.md
@@ -0,0 +1,3 @@
+This is a simple stub for https://github.com/Masterminds/squirrel, strictly for use in query testing.
+
+See the LICENSE file in this folder for information about the licensing of the original library.
diff --git a/ql/test/library-tests/semmle/go/GoModExpr/squirrel/go.mod b/ql/test/library-tests/semmle/go/GoModExpr/squirrel/go.mod
new file mode 100644
index 00000000000..78405f23173
--- /dev/null
+++ b/ql/test/library-tests/semmle/go/GoModExpr/squirrel/go.mod
@@ -0,0 +1,3 @@
+module github.com/github/codeql-go/ql/test/library-tests/semmle/go/GoModExpr/squirrel
+
+go 1.14
diff --git a/ql/test/library-tests/semmle/go/GoModExpr/squirrel/squirrel.go b/ql/test/library-tests/semmle/go/GoModExpr/squirrel/squirrel.go
new file mode 100644
index 00000000000..78a19d3a6f2
--- /dev/null
+++ b/ql/test/library-tests/semmle/go/GoModExpr/squirrel/squirrel.go
@@ -0,0 +1,24 @@
+package squirrel
+
+type StatementBuilderType struct{}
+
+func Expr(e string, args ...interface{}) string {
+	return Expr(e, args...)
+}
+
+var StatementBuilder = &StatementBuilderType{}
+
+func (b *StatementBuilderType) Insert(table string) *StatementBuilderType {
+	return b
+}
+
+func (b *StatementBuilderType) Columns(columns ...string) *StatementBuilderType {
+	return b
+}
+
+func (b *StatementBuilderType) Values(strings ...string) *StatementBuilderType {
+	return b
+}
+
+func (b *StatementBuilderType) Exec() {
+}