diff --git a/core/src/main/java/com/google/errorprone/bugpatterns/time/DurationToLongTimeUnit.java b/core/src/main/java/com/google/errorprone/bugpatterns/time/DurationToLongTimeUnit.java
index 607b17714e6..6950b273498 100644
--- a/core/src/main/java/com/google/errorprone/bugpatterns/time/DurationToLongTimeUnit.java
+++ b/core/src/main/java/com/google/errorprone/bugpatterns/time/DurationToLongTimeUnit.java
@@ -78,6 +78,7 @@ public final class DurationToLongTimeUnit extends BugChecker
           // JavaTime
           .put(instanceMethod().onExactClass(JAVA_DURATION).named("toNanos"), NANOSECONDS)
           .put(instanceMethod().onExactClass(JAVA_DURATION).named("toMillis"), MILLISECONDS)
+          .put(instanceMethod().onExactClass(JAVA_DURATION).named("toSeconds"), SECONDS)
           .put(instanceMethod().onExactClass(JAVA_DURATION).named("getSeconds"), SECONDS)
           .put(instanceMethod().onExactClass(JAVA_DURATION).named("toMinutes"), MINUTES)
           .put(instanceMethod().onExactClass(JAVA_DURATION).named("toHours"), HOURS)
diff --git a/core/src/test/java/com/google/errorprone/bugpatterns/time/DurationToLongTimeUnitTest.java b/core/src/test/java/com/google/errorprone/bugpatterns/time/DurationToLongTimeUnitTest.java
index fea1ade9bbd..bd85036e6ec 100644
--- a/core/src/test/java/com/google/errorprone/bugpatterns/time/DurationToLongTimeUnitTest.java
+++ b/core/src/test/java/com/google/errorprone/bugpatterns/time/DurationToLongTimeUnitTest.java
@@ -43,6 +43,7 @@ void javaTime(Future<String> f, java.time.Duration d) throws Exception {
                 f.get(42L, TimeUnit.SECONDS);
                 f.get(d.toNanos(), TimeUnit.NANOSECONDS);
                 f.get(d.toMillis(), TimeUnit.MILLISECONDS);
+                f.get(d.toSeconds(), TimeUnit.SECONDS);
                 f.get(d.getSeconds(), TimeUnit.SECONDS);
                 f.get(d.toMinutes(), TimeUnit.MINUTES);
                 f.get(d.toHours(), TimeUnit.HOURS);
@@ -104,6 +105,7 @@ void javaTime(Future<String> f, java.time.Duration d) throws Exception {
                 f.get(42L, SECONDS);
                 f.get(d.toNanos(), NANOSECONDS);
                 f.get(d.toMillis(), MILLISECONDS);
+                f.get(d.toSeconds(), SECONDS);
                 f.get(d.getSeconds(), SECONDS);
                 f.get(d.toMinutes(), MINUTES);
                 f.get(d.toHours(), HOURS);
@@ -161,6 +163,8 @@ void javaTime(Future<String> f, java.time.Duration d) throws Exception {
                 f.get(d.toNanos(), TimeUnit.MILLISECONDS);
                 // BUG: Diagnostic contains: f.get(d.toMillis(), TimeUnit.MILLISECONDS)
                 f.get(d.toMillis(), TimeUnit.NANOSECONDS);
+                // BUG: Diagnostic contains: f.get(d.toSeconds(), TimeUnit.SECONDS)
+                f.get(d.toSeconds(), TimeUnit.MINUTES);
                 // BUG: Diagnostic contains: f.get(d.getSeconds(), TimeUnit.SECONDS)
                 f.get(d.getSeconds(), TimeUnit.MINUTES);
                 // BUG: Diagnostic contains: f.get(d.toMinutes(), TimeUnit.MINUTES)
@@ -233,6 +237,8 @@ void javaTime(Future<String> f, java.time.Duration d) throws Exception {
                 f.get(d.toNanos(), MILLISECONDS);
                 // BUG: Diagnostic contains: f.get(d.toMillis(), TimeUnit.MILLISECONDS)
                 f.get(d.toMillis(), NANOSECONDS);
+                // BUG: Diagnostic contains: f.get(d.toSeconds(), TimeUnit.SECONDS)
+                f.get(d.toSeconds(), MINUTES);
                 // BUG: Diagnostic contains: f.get(d.getSeconds(), TimeUnit.SECONDS)
                 f.get(d.getSeconds(), MINUTES);
                 // BUG: Diagnostic contains: f.get(d.toMinutes(), TimeUnit.MINUTES)