diff --git a/gopls/internal/regtest/workspace/workspace_test.go b/gopls/internal/regtest/workspace/workspace_test.go
index a241348cae6..ed2c9effdaf 100644
--- a/gopls/internal/regtest/workspace/workspace_test.go
+++ b/gopls/internal/regtest/workspace/workspace_test.go
@@ -802,13 +802,28 @@ func TestUseGoWorkDiagnosticMissingModule(t *testing.T) {
 go 1.18
 
 use ./foo
+-- bar/go.mod --
+module example.com/bar
 `
 	Run(t, files, func(t *testing.T, env *Env) {
 		env.OpenFile("go.work")
 		env.Await(
 			env.DiagnosticAtRegexpWithMessage("go.work", "use", "directory ./foo does not contain a module"),
 		)
-		t.Log("bar")
+		// The following tests is a regression test against an issue where we weren't
+		// copying the workFile struct field on workspace when a new one was created in
+		// (*workspace).invalidate. Set the buffer content to a working file so that
+		// invalidate recognizes the workspace to be change and copies over the workspace
+		// struct, and then set the content back to the old contents to make sure
+		// the diagnostic still shows up.
+		env.SetBufferContent("go.work", "go 1.18 \n\n use ./bar\n")
+		env.Await(
+			env.NoDiagnosticAtRegexp("go.work", "use"),
+		)
+		env.SetBufferContent("go.work", "go 1.18 \n\n use ./foo\n")
+		env.Await(
+			env.DiagnosticAtRegexpWithMessage("go.work", "use", "directory ./foo does not contain a module"),
+		)
 	})
 }
 
diff --git a/internal/lsp/cache/workspace.go b/internal/lsp/cache/workspace.go
index d10f5bc217c..16f97dbe635 100644
--- a/internal/lsp/cache/workspace.go
+++ b/internal/lsp/cache/workspace.go
@@ -282,6 +282,7 @@ func (w *workspace) invalidate(ctx context.Context, changes map[span.URI]*fileCh
 		moduleSource:   w.moduleSource,
 		knownModFiles:  make(map[span.URI]struct{}),
 		activeModFiles: make(map[span.URI]struct{}),
+		workFile:       w.workFile,
 		mod:            w.mod,
 		sum:            w.sum,
 		wsDirs:         w.wsDirs,