diff --git a/src/ast/variable_decl_statement_test.cc b/src/ast/variable_decl_statement_test.cc
new file mode 100644
index 0000000..84149c1
--- /dev/null
+++ b/src/ast/variable_decl_statement_test.cc
@@ -0,0 +1,89 @@
+// Copyright 2020 The Tint Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "src/ast/variable_decl_statement.h"
+
+#include "gtest/gtest.h"
+#include "src/ast/type/f32_type.h"
+#include "src/ast/variable.h"
+
+namespace tint {
+namespace ast {
+namespace {
+
+using VariableDeclStatementTest = testing::Test;
+
+TEST_F(VariableDeclStatementTest, Creation) {
+  type::F32Type f32;
+  auto var = std::make_unique<Variable>("a", StorageClass::kNone, &f32);
+  auto var_ptr = var.get();
+
+  VariableDeclStatement stmt(std::move(var));
+  EXPECT_EQ(stmt.variable(), var_ptr);
+}
+
+TEST_F(VariableDeclStatementTest, Creation_WithSource) {
+  type::F32Type f32;
+  auto var = std::make_unique<Variable>("a", StorageClass::kNone, &f32);
+
+  VariableDeclStatement stmt(Source{20, 2}, std::move(var));
+  auto src = stmt.source();
+  EXPECT_EQ(src.line, 20);
+  EXPECT_EQ(src.column, 2);
+}
+
+TEST_F(VariableDeclStatementTest, IsVariableDecl) {
+  VariableDeclStatement s;
+  EXPECT_TRUE(s.IsVariableDecl());
+}
+
+TEST_F(VariableDeclStatementTest, IsValid) {
+  type::F32Type f32;
+  auto var = std::make_unique<Variable>("a", StorageClass::kNone, &f32);
+  VariableDeclStatement stmt(std::move(var));
+  EXPECT_TRUE(stmt.IsValid());
+}
+
+TEST_F(VariableDeclStatementTest, IsValid_InvalidVariable) {
+  type::F32Type f32;
+  auto var = std::make_unique<Variable>("", StorageClass::kNone, &f32);
+  VariableDeclStatement stmt(std::move(var));
+  EXPECT_FALSE(stmt.IsValid());
+}
+
+TEST_F(VariableDeclStatementTest, IsValid_NullVariable) {
+  VariableDeclStatement stmt;
+  EXPECT_FALSE(stmt.IsValid());
+}
+
+TEST_F(VariableDeclStatementTest, ToStr) {
+  type::F32Type f32;
+  auto var = std::make_unique<Variable>("a", StorageClass::kNone, &f32);
+
+  VariableDeclStatement stmt(Source{20, 2}, std::move(var));
+  std::ostringstream out;
+  stmt.to_str(out, 2);
+  EXPECT_EQ(out.str(), R"(  VariableDeclStatement{
+    Variable{
+      a
+      none
+      __f32
+    }
+  }
+)");
+}
+
+}  // namespace
+}  // namespace ast
+}  // namespace tint