diff --git a/internal/postgres/path_test.go b/internal/postgres/path_test.go
index 8d4e121..9d80fe2 100644
--- a/internal/postgres/path_test.go
+++ b/internal/postgres/path_test.go
@@ -15,7 +15,6 @@
 	"golang.org/x/pkgsite/internal"
 	"golang.org/x/pkgsite/internal/licenses"
 	"golang.org/x/pkgsite/internal/source"
-	"golang.org/x/pkgsite/internal/stdlib"
 	"golang.org/x/pkgsite/internal/testing/sample"
 )
 
@@ -391,49 +390,3 @@
 		}
 	}
 }
-
-func TestGetStdlibPaths(t *testing.T) {
-	ctx, cancel := context.WithTimeout(context.Background(), testTimeout)
-	defer cancel()
-	defer ResetTestDB(testDB, t)
-
-	// Insert two versions of some stdlib packages.
-	for _, data := range []struct {
-		version  string
-		suffixes []string
-	}{
-		{
-			// earlier version; should be ignored
-			"v1.1.0",
-			[]string{"bad/json"},
-		},
-		{
-			"v1.2.0",
-			[]string{
-				"encoding/json",
-				"archive/json",
-				"net/http",     // no "json"
-				"foo/json/moo", // "json" not the last component
-				"bar/xjson",    // "json" not alone
-				"baz/jsonx",    // ditto
-			},
-		},
-	} {
-		m := sample.Module(stdlib.ModulePath, data.version, data.suffixes...)
-		for _, p := range m.Packages() {
-			p.Imports = nil
-		}
-		if err := testDB.InsertModule(ctx, m); err != nil {
-			t.Fatal(err)
-		}
-	}
-
-	got, err := testDB.GetStdlibPathsWithSuffix(ctx, "json")
-	if err != nil {
-		t.Fatal(err)
-	}
-	want := []string{"archive/json", "encoding/json"}
-	if !cmp.Equal(got, want) {
-		t.Errorf("got %v, want %v", got, want)
-	}
-}
diff --git a/internal/postgres/stdlib_test.go b/internal/postgres/stdlib_test.go
new file mode 100644
index 0000000..19e473b
--- /dev/null
+++ b/internal/postgres/stdlib_test.go
@@ -0,0 +1,60 @@
+// Copyright 2020 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package postgres
+
+import (
+	"context"
+	"testing"
+
+	"github.com/google/go-cmp/cmp"
+	"golang.org/x/pkgsite/internal/stdlib"
+	"golang.org/x/pkgsite/internal/testing/sample"
+)
+
+func TestGetStdlibPaths(t *testing.T) {
+	ctx, cancel := context.WithTimeout(context.Background(), testTimeout)
+	defer cancel()
+	defer ResetTestDB(testDB, t)
+
+	// Insert two versions of some stdlib packages.
+	for _, data := range []struct {
+		version  string
+		suffixes []string
+	}{
+		{
+			// earlier version; should be ignored
+			"v1.1.0",
+			[]string{"bad/json"},
+		},
+		{
+			"v1.2.0",
+			[]string{
+				"encoding/json",
+				"archive/json",
+				"net/http",     // no "json"
+				"foo/json/moo", // "json" not the last component
+				"bar/xjson",    // "json" not alone
+				"baz/jsonx",    // ditto
+			},
+		},
+	} {
+		m := sample.Module(stdlib.ModulePath, data.version, data.suffixes...)
+		for _, p := range m.Packages() {
+			p.Imports = nil
+		}
+		if err := testDB.InsertModule(ctx, m); err != nil {
+			t.Fatal(err)
+		}
+	}
+
+	got, err := testDB.GetStdlibPathsWithSuffix(ctx, "json")
+	if err != nil {
+		t.Fatal(err)
+	}
+	want := []string{"archive/json", "encoding/json"}
+	if !cmp.Equal(got, want) {
+		t.Errorf("got %v, want %v", got, want)
+	}
+}