diff --git a/testutils/src/main/java/com/google/android/exoplayer2/testutil/truth/SpannedSubject.java b/testutils/src/main/java/com/google/android/exoplayer2/testutil/truth/SpannedSubject.java
index 16144a170b..55e2117e04 100644
--- a/testutils/src/main/java/com/google/android/exoplayer2/testutil/truth/SpannedSubject.java
+++ b/testutils/src/main/java/com/google/android/exoplayer2/testutil/truth/SpannedSubject.java
@@ -30,6 +30,7 @@ import android.text.style.UnderlineSpan;
 import androidx.annotation.CheckResult;
 import androidx.annotation.ColorInt;
 import androidx.annotation.Nullable;
+import com.google.android.exoplayer2.text.span.RubySpan;
 import com.google.common.truth.FailureMetadata;
 import com.google.common.truth.Subject;
 import java.util.ArrayList;
@@ -194,7 +195,7 @@ public final class SpannedSubject extends Subject {
   }
 
   /**
-   * Checks that the subject as a {@link ForegroundColorSpan} from {@code start} to {@code end}.
+   * Checks that the subject has a {@link ForegroundColorSpan} from {@code start} to {@code end}.
    *
    * <p>The color is asserted in a follow-up method call on the return {@link Colored} object.
    *
@@ -222,7 +223,7 @@ public final class SpannedSubject extends Subject {
   }
 
   /**
-   * Checks that the subject as a {@link ForegroundColorSpan} from {@code start} to {@code end}.
+   * Checks that the subject has a {@link BackgroundColorSpan} from {@code start} to {@code end}.
    *
    * <p>The color is asserted in a follow-up method call on the return {@link Colored} object.
    *
@@ -249,6 +250,30 @@ public final class SpannedSubject extends Subject {
         .that(backgroundColorSpans);
   }
 
+  /**
+   * Checks that the subject has a {@link RubySpan} from {@code start} to {@code end}.
+   *
+   * <p>The ruby-text is asserted in a follow-up method call on the return {@link RubyText} object.
+   *
+   * @param start The start of the expected span.
+   * @param end The end of the expected span.
+   * @return A {@link Colored} object to assert on the color of the matching spans.
+   */
+  @CheckResult
+  public RubyText hasRubySpanBetween(int start, int end) {
+    if (actual == null) {
+      failWithoutActual(simpleFact("Spanned must not be null"));
+      return ALREADY_FAILED_WITH_TEXT;
+    }
+
+    List<RubySpan> rubySpans = findMatchingSpans(start, end, RubySpan.class);
+    if (rubySpans.isEmpty()) {
+      failWithExpectedSpan(start, end, RubySpan.class, actual.toString().substring(start, end));
+      return ALREADY_FAILED_WITH_TEXT;
+    }
+    return check("RubySpan (start=%s,end=%s)", start, end).about(rubySpans(actual)).that(rubySpans);
+  }
+
   private <T> List<T> findMatchingSpans(int startIndex, int endIndex, Class<T> spanClazz) {
     List<T> spans = new ArrayList<>();
     for (T span : actual.getSpans(startIndex, endIndex, spanClazz)) {
@@ -440,4 +465,92 @@ public final class SpannedSubject extends Subject {
       return check("flags").about(spanFlags()).that(matchingSpanFlags);
     }
   }
+
+  /** Allows assertions about a span's ruby text and its position. */
+  public interface RubyText {
+
+    /**
+     * Checks that at least one of the matched spans has the expected {@code text}.
+     *
+     * @param text The expected text.
+     * @param position The expected position of the text.
+     * @return A {@link WithSpanFlags} object for optional additional assertions on the flags.
+     */
+    AndSpanFlags withTextAndPosition(String text, @RubySpan.Position int position);
+  }
+
+  private static final RubyText ALREADY_FAILED_WITH_TEXT =
+      (text, position) -> ALREADY_FAILED_AND_FLAGS;
+
+  private Factory<RubySpansSubject, List<RubySpan>> rubySpans(Spanned actualSpanned) {
+    return (FailureMetadata metadata, List<RubySpan> spans) ->
+        new RubySpansSubject(metadata, spans, actualSpanned);
+  }
+
+  private static final class RubySpansSubject extends Subject implements RubyText {
+
+    private final List<RubySpan> actualSpans;
+    private final Spanned actualSpanned;
+
+    private RubySpansSubject(
+        FailureMetadata metadata, List<RubySpan> actualSpans, Spanned actualSpanned) {
+      super(metadata, actualSpans);
+      this.actualSpans = actualSpans;
+      this.actualSpanned = actualSpanned;
+    }
+
+    @Override
+    public AndSpanFlags withTextAndPosition(String text, @RubySpan.Position int position) {
+      List<Integer> matchingSpanFlags = new ArrayList<>();
+      List<TextAndPosition> spanTextsAndPositions = new ArrayList<>();
+      for (RubySpan span : actualSpans) {
+        spanTextsAndPositions.add(new TextAndPosition(span.rubyText, span.position));
+        if (span.rubyText.equals(text)) {
+          matchingSpanFlags.add(actualSpanned.getSpanFlags(span));
+        }
+      }
+      check("rubyTextAndPosition")
+          .that(spanTextsAndPositions)
+          .containsExactly(new TextAndPosition(text, position));
+      return check("flags").about(spanFlags()).that(matchingSpanFlags);
+    }
+
+    private static class TextAndPosition {
+      private final String text;
+      @RubySpan.Position private final int position;
+
+      private TextAndPosition(String text, int position) {
+        this.text = text;
+        this.position = position;
+      }
+
+      @Override
+      public boolean equals(Object o) {
+        if (this == o) {
+          return true;
+        }
+        if (o == null || getClass() != o.getClass()) {
+          return false;
+        }
+
+        TextAndPosition that = (TextAndPosition) o;
+        if (position != that.position) {
+          return false;
+        }
+        return text.equals(that.text);
+      }
+
+      @Override
+      public int hashCode() {
+        int result = text.hashCode();
+        result = 31 * result + position;
+        return result;
+      }
+
+      @Override
+      public String toString() {
+        return String.format("{text='%s',position=%s}", text, position);
+      }
+    }
+  }
 }
diff --git a/testutils/src/test/java/com/google/android/exoplayer2/testutil/truth/SpannedSubjectTest.java b/testutils/src/test/java/com/google/android/exoplayer2/testutil/truth/SpannedSubjectTest.java
index c33a1128a0..3eb0509eb4 100644
--- a/testutils/src/test/java/com/google/android/exoplayer2/testutil/truth/SpannedSubjectTest.java
+++ b/testutils/src/test/java/com/google/android/exoplayer2/testutil/truth/SpannedSubjectTest.java
@@ -30,6 +30,7 @@ import android.text.style.ForegroundColorSpan;
 import android.text.style.StyleSpan;
 import android.text.style.UnderlineSpan;
 import androidx.test.ext.junit.runners.AndroidJUnit4;
+import com.google.android.exoplayer2.text.span.RubySpan;
 import com.google.common.truth.ExpectFailure;
 import org.junit.Test;
 import org.junit.runner.RunWith;
@@ -338,6 +339,120 @@ public class SpannedSubjectTest {
         .contains(String.valueOf(Spanned.SPAN_INCLUSIVE_EXCLUSIVE));
   }
 
+  @Test
+  public void rubySpan_success() {
+    SpannableString spannable = SpannableString.valueOf("test with rubied section");
+    int start = "test with ".length();
+    int end = start + "rubied".length();
+    spannable.setSpan(
+        new RubySpan("ruby text", RubySpan.POSITION_OVER),
+        start,
+        end,
+        Spanned.SPAN_INCLUSIVE_EXCLUSIVE);
+
+    assertThat(spannable)
+        .hasRubySpanBetween(start, end)
+        .withTextAndPosition("ruby text", RubySpan.POSITION_OVER)
+        .andFlags(Spanned.SPAN_INCLUSIVE_EXCLUSIVE);
+  }
+
+  @Test
+  public void rubySpan_wrongEndIndex() {
+    SpannableString spannable = SpannableString.valueOf("test with cyan section");
+    int start = "test with ".length();
+    int end = start + "cyan".length();
+    spannable.setSpan(
+        new RubySpan("ruby text", RubySpan.POSITION_OVER),
+        start,
+        end,
+        Spanned.SPAN_INCLUSIVE_EXCLUSIVE);
+
+    int incorrectEnd = end + 2;
+    AssertionError expected =
+        expectFailure(
+            whenTesting ->
+                whenTesting
+                    .that(spannable)
+                    .hasRubySpanBetween(start, incorrectEnd)
+                    .withTextAndPosition("ruby text", RubySpan.POSITION_OVER));
+    assertThat(expected).factValue("expected").contains("end=" + incorrectEnd);
+    assertThat(expected).factValue("but found").contains("end=" + end);
+  }
+
+  @Test
+  public void rubySpan_wrongText() {
+    SpannableString spannable = SpannableString.valueOf("test with rubied section");
+    int start = "test with ".length();
+    int end = start + "rubied".length();
+    spannable.setSpan(
+        new RubySpan("ruby text", RubySpan.POSITION_OVER),
+        start,
+        end,
+        Spanned.SPAN_INCLUSIVE_EXCLUSIVE);
+
+    AssertionError expected =
+        expectFailure(
+            whenTesting ->
+                whenTesting
+                    .that(spannable)
+                    .hasRubySpanBetween(start, end)
+                    .withTextAndPosition("incorrect text", RubySpan.POSITION_OVER));
+    assertThat(expected).factValue("value of").contains("rubyTextAndPosition");
+    assertThat(expected).factValue("expected").contains("text='incorrect text'");
+    assertThat(expected).factValue("but was").contains("text='ruby text'");
+  }
+
+  @Test
+  public void rubySpan_wrongPosition() {
+    SpannableString spannable = SpannableString.valueOf("test with rubied section");
+    int start = "test with ".length();
+    int end = start + "rubied".length();
+    spannable.setSpan(
+        new RubySpan("ruby text", RubySpan.POSITION_OVER),
+        start,
+        end,
+        Spanned.SPAN_INCLUSIVE_EXCLUSIVE);
+
+    AssertionError expected =
+        expectFailure(
+            whenTesting ->
+                whenTesting
+                    .that(spannable)
+                    .hasRubySpanBetween(start, end)
+                    .withTextAndPosition("ruby text", RubySpan.POSITION_UNDER));
+    assertThat(expected).factValue("value of").contains("rubyTextAndPosition");
+    assertThat(expected).factValue("expected").contains("position=" + RubySpan.POSITION_UNDER);
+    assertThat(expected).factValue("but was").contains("position=" + RubySpan.POSITION_OVER);
+  }
+
+  @Test
+  public void rubySpan_wrongFlags() {
+    SpannableString spannable = SpannableString.valueOf("test with rubied section");
+    int start = "test with ".length();
+    int end = start + "rubied".length();
+    spannable.setSpan(
+        new RubySpan("ruby text", RubySpan.POSITION_OVER),
+        start,
+        end,
+        Spanned.SPAN_INCLUSIVE_EXCLUSIVE);
+
+    AssertionError expected =
+        expectFailure(
+            whenTesting ->
+                whenTesting
+                    .that(spannable)
+                    .hasRubySpanBetween(start, end)
+                    .withTextAndPosition("ruby text", RubySpan.POSITION_OVER)
+                    .andFlags(Spanned.SPAN_EXCLUSIVE_EXCLUSIVE));
+    assertThat(expected).factValue("value of").contains("flags");
+    assertThat(expected)
+        .factValue("expected to contain")
+        .contains(String.valueOf(Spanned.SPAN_EXCLUSIVE_EXCLUSIVE));
+    assertThat(expected)
+        .factValue("but was")
+        .contains(String.valueOf(Spanned.SPAN_INCLUSIVE_EXCLUSIVE));
+  }
+
   private static AssertionError expectFailure(
       ExpectFailure.SimpleSubjectBuilderCallback<SpannedSubject, Spanned> callback) {
     return expectFailureAbout(spanned(), callback);