diff --git a/test/intl402/Segmenter/prototype/segment/segment-grapheme-iterable.js b/test/intl402/Segmenter/prototype/segment/segment-grapheme-iterable.js
index 41b693f35150584306daf398c38444324e1803e1..4b1955e6ebcfc4aa8ca3f21401dea221ba47ccb9 100644
--- a/test/intl402/Segmenter/prototype/segment/segment-grapheme-iterable.js
+++ b/test/intl402/Segmenter/prototype/segment/segment-grapheme-iterable.js
@@ -40,7 +40,7 @@ for (const text of [
     segments.push(v.segment);
 
     // manually advance the iter.
-    assertFalse(iter.following());
+    assert.sameValue(iter.following(), false);
     assert.sameValue(iter.breakType, v.breakType);
     assert.sameValue(text.substring(prev, iter.position), v.segment);
     prev = iter.position;
diff --git a/test/intl402/Segmenter/prototype/segment/segment-line-iterable.js b/test/intl402/Segmenter/prototype/segment/segment-line-iterable.js
index 88dd9349da53266f1e426d04c6fad1aae2c225da..7be007c1a4655b6c27dade58024fbc03009ce09e 100644
--- a/test/intl402/Segmenter/prototype/segment/segment-line-iterable.js
+++ b/test/intl402/Segmenter/prototype/segment/segment-line-iterable.js
@@ -40,7 +40,7 @@ for (const text of [
     segments.push(v.segment);
 
     // manually advance the iter.
-    assertFalse(iter.following());
+    assert.sameValue(iter.following(), false);
     assert.sameValue(iter.breakType, v.breakType);
     assert.sameValue(text.substring(prev, iter.position), v.segment);
     prev = iter.position;
diff --git a/test/intl402/Segmenter/prototype/segment/segment-sentence-iterable.js b/test/intl402/Segmenter/prototype/segment/segment-sentence-iterable.js
index b7596d3c9ca964f641d3329eef9d2bea9e7c2e53..cf9896a73dfc9094643ed11ba02231f5155974f5 100644
--- a/test/intl402/Segmenter/prototype/segment/segment-sentence-iterable.js
+++ b/test/intl402/Segmenter/prototype/segment/segment-sentence-iterable.js
@@ -40,7 +40,7 @@ for (const text of [
     segments.push(v.segment);
 
     // manually advance the iter.
-    assertFalse(iter.following());
+    assert.sameValue(iter.following(), false);
     assert.sameValue(iter.breakType, v.breakType);
     assert.sameValue(text.substring(prev, iter.position), v.segment);
     prev = iter.position;
diff --git a/test/intl402/Segmenter/prototype/segment/segment-word-iterable.js b/test/intl402/Segmenter/prototype/segment/segment-word-iterable.js
index d28f0489a7b145a3e0ed408b27d30dda89ce3587..8f8fad194b3413a8d06f7e90c9d60c8ea1c9ba91 100644
--- a/test/intl402/Segmenter/prototype/segment/segment-word-iterable.js
+++ b/test/intl402/Segmenter/prototype/segment/segment-word-iterable.js
@@ -40,7 +40,7 @@ for (const text of [
     segments.push(v.segment);
 
     // manually advance the iter.
-    assertFalse(iter.following());
+    assert.sameValue(iter.following(), false);
     assert.sameValue(iter.breakType, v.breakType);
     assert.sameValue(text.substring(prev, iter.position), v.segment);
     prev = iter.position;