diff --git a/src/test/java/com/google/devtools/build/lib/bazel/bzlmod/ModuleExtensionResolutionTest.java b/src/test/java/com/google/devtools/build/lib/bazel/bzlmod/ModuleExtensionResolutionTest.java
index 81663cbf665af6..e2519d3292aa7d 100644
--- a/src/test/java/com/google/devtools/build/lib/bazel/bzlmod/ModuleExtensionResolutionTest.java
+++ b/src/test/java/com/google/devtools/build/lib/bazel/bzlmod/ModuleExtensionResolutionTest.java
@@ -898,7 +898,7 @@ public void labels_passedOnToRepoRule() throws Exception {
     SkyKey extensionSkyKey =
         SingleExtensionValue.key(
             ModuleExtensionId.create(
-                Label.parseCanonicalUnchecked("@@ext+//:defs.bzl"), "ext", Optional.empty()));
+                Label.parseCanonicalUnchecked("@@ext~//:defs.bzl"), "ext", Optional.empty()));
     EvaluationResult<SingleExtensionValue> extensionResult =
         evaluator.evaluate(ImmutableList.of(extensionSkyKey), evaluationContext);
     if (extensionResult.hasError()) {
@@ -911,7 +911,7 @@ public void labels_passedOnToRepoRule() throws Exception {
                 .get()
                 .moduleExtension()
                 .getRecordedRepoMappingEntries())
-        .containsCell(RepositoryName.create("foo+"), "bar", RepositoryName.create("bar+"));
+        .containsCell(RepositoryName.create("foo~"), "bar", RepositoryName.create("bar~"));
   }
 
   @Test
diff --git a/src/test/java/com/google/devtools/build/lib/bazel/bzlmod/StarlarkBazelModuleTest.java b/src/test/java/com/google/devtools/build/lib/bazel/bzlmod/StarlarkBazelModuleTest.java
index 8b39f847a5dcdd..ff43c9610abf2e 100644
--- a/src/test/java/com/google/devtools/build/lib/bazel/bzlmod/StarlarkBazelModuleTest.java
+++ b/src/test/java/com/google/devtools/build/lib/bazel/bzlmod/StarlarkBazelModuleTest.java
@@ -129,7 +129,7 @@ public void basic() throws Exception {
                 Label.parseCanonical("@@bar~//:pom.xml")));
 
     assertThat(repoMappingRecorder.recordedEntries())
-        .containsCell(RepositoryName.create("foo+"), "bar", RepositoryName.create("bar+"));
+        .containsCell(RepositoryName.create("foo~"), "bar", RepositoryName.create("bar~"));
   }
 
   @Test
diff --git a/src/test/py/bazel/bzlmod/bazel_lockfile_test.py b/src/test/py/bazel/bzlmod/bazel_lockfile_test.py
index 7d6096dafb7f45..c81cd54cf3ac33 100644
--- a/src/test/py/bazel/bzlmod/bazel_lockfile_test.py
+++ b/src/test/py/bazel/bzlmod/bazel_lockfile_test.py
@@ -1950,7 +1950,7 @@ def testExtensionRepoMappingChange_tag(self):
     _, _, stderr = self.RunBazel(['build', ':lol'])
     stderr = '\n'.join(stderr)
     self.assertIn('ran the extension!', stderr)
-    self.assertIn('STR=@@bar+//:lib_foo', stderr)
+    self.assertIn('STR=@@bar~//:lib_foo', stderr)
 
     # Shutdown bazel to make sure we rely on the lockfile and not skyframe
     self.RunBazel(['shutdown'])
@@ -1970,7 +1970,7 @@ def testExtensionRepoMappingChange_tag(self):
     _, _, stderr = self.RunBazel(['build', ':lol'])
     stderr = '\n'.join(stderr)
     self.assertNotIn('ran the extension!', stderr)
-    self.assertIn('STR=@@bar+//:lib_foo', stderr)
+    self.assertIn('STR=@@bar~//:lib_foo', stderr)
 
   def testExtensionRepoMappingChange_loadsAndRepoRelativeLabels(self):
     # Regression test for #20721; same test as above, except that the call to