diff --git a/src/test/java/com/android/tools/r8/ir/optimize/redundantarraygetelimination/ArrayGetTypePromotionTest.java b/src/test/java/com/android/tools/r8/ir/optimize/redundantarraygetelimination/ArrayGetTypePromotionTest.java
new file mode 100644
index 0000000..1f9edef
--- /dev/null
+++ b/src/test/java/com/android/tools/r8/ir/optimize/redundantarraygetelimination/ArrayGetTypePromotionTest.java
@@ -0,0 +1,120 @@
+// Copyright (c) 2023, the R8 project authors. Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+package com.android.tools.r8.ir.optimize.redundantarraygetelimination;
+
+import com.android.tools.r8.NeverInline;
+import com.android.tools.r8.NoMethodStaticizing;
+import com.android.tools.r8.TestBase;
+import com.android.tools.r8.TestParameters;
+import com.android.tools.r8.TestParametersCollection;
+import java.io.IOException;
+import org.junit.BeforeClass;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.junit.runners.Parameterized;
+import org.junit.runners.Parameterized.Parameter;
+import org.junit.runners.Parameterized.Parameters;
+
+/** Regression test for b/278573402. */
+@RunWith(Parameterized.class)
+public class ArrayGetTypePromotionTest extends TestBase {
+
+  private static final String EXPECTED_OUTPUT = "Hello, world!";
+
+  private static byte[] programClassFileData;
+
+  @Parameter(0)
+  public TestParameters parameters;
+
+  @Parameters(name = "{0}")
+  public static TestParametersCollection data() {
+    return getTestParameters().withAllRuntimesAndApiLevels().build();
+  }
+
+  @BeforeClass
+  public static void setup() throws IOException {
+    programClassFileData =
+        transformer(Main.class)
+            .transformMethodInsnInMethod(
+                "main",
+                (opcode, owner, name, descriptor, isInterface, visitor) -> {
+                  if (name.equals("getGreeter")) {
+                    visitor.visitMethodInsn(
+                        opcode, owner, "getGreeterAsObject", "()Ljava/lang/Object;", isInterface);
+                  } else {
+                    visitor.visitMethodInsn(opcode, owner, name, descriptor, isInterface);
+                  }
+                })
+            .transform();
+  }
+
+  @Test
+  public void testJvm() throws Exception {
+    parameters.assumeJvmTestParameters();
+    testForJvm(parameters)
+        .addProgramClasses(Greeter.class)
+        .addProgramClassFileData(programClassFileData)
+        .run(parameters.getRuntime(), Main.class)
+        .assertSuccessWithOutputLines(EXPECTED_OUTPUT);
+  }
+
+  @Test
+  public void testD8() throws Exception {
+    parameters.assumeDexRuntime();
+    testForD8()
+        .addProgramClasses(Greeter.class)
+        .addProgramClassFileData(programClassFileData)
+        .release()
+        .setMinApi(parameters)
+        .compile()
+        .run(parameters.getRuntime(), Main.class)
+        // TODO(b/278573402): Disallow redundant array load elimination.
+        .assertFailureWithErrorThatThrows(VerifyError.class);
+  }
+
+  @Test
+  public void testR8() throws Exception {
+    testForR8(parameters.getBackend())
+        .addProgramClasses(Greeter.class)
+        .addProgramClassFileData(programClassFileData)
+        .addKeepMainRule(Main.class)
+        .enableInliningAnnotations()
+        .enableNoMethodStaticizingAnnotations()
+        .setMinApi(parameters)
+        .compile()
+        .run(parameters.getRuntime(), Main.class)
+        // TODO(b/278573402): Disallow redundant array load elimination.
+        .assertFailureWithErrorThatThrows(VerifyError.class);
+  }
+
+  static class Main {
+
+    public static void main(String[] args) {
+      Greeter[] greeter = new Greeter[1];
+      greeter[0] = getGreeter(); // transformed to getGreeterAsObject
+      greeter[0].greet();
+    }
+
+    // Replaced by getGreeterAsObject().
+    @NeverInline
+    static Greeter getGreeter() {
+      throw new RuntimeException();
+    }
+
+    @NeverInline
+    static Object getGreeterAsObject() {
+      return System.currentTimeMillis() > 0 ? new Greeter() : new Object();
+    }
+  }
+
+  static class Greeter {
+
+    @NeverInline
+    @NoMethodStaticizing
+    void greet() {
+      System.out.println("Hello, world!");
+    }
+  }
+}