diff --git a/compiler/rustc_mir_build/src/builder/matches/buckets.rs b/compiler/rustc_mir_build/src/builder/matches/buckets.rs
index f8af50ee52fe..9a227486a4f1 100644
--- a/compiler/rustc_mir_build/src/builder/matches/buckets.rs
+++ b/compiler/rustc_mir_build/src/builder/matches/buckets.rs
@@ -213,7 +213,7 @@ impl<'a, 'tcx> Builder<'a, 'tcx> {
             }
 
             (
-                &TestKind::Len { len: test_len, op: BinOp::Eq },
+                &TestKind::SliceLen { len: test_len, op: BinOp::Eq },
                 &TestableCase::Slice { len, variable_length },
             ) => {
                 match (test_len.cmp(&len), variable_length) {
@@ -245,7 +245,7 @@ impl<'a, 'tcx> Builder<'a, 'tcx> {
                 }
             }
             (
-                &TestKind::Len { len: test_len, op: BinOp::Ge },
+                &TestKind::SliceLen { len: test_len, op: BinOp::Ge },
                 &TestableCase::Slice { len, variable_length },
             ) => {
                 // the test is `$actual_len >= test_len`
@@ -338,7 +338,7 @@ impl<'a, 'tcx> Builder<'a, 'tcx> {
                 TestKind::Switch { .. }
                 | TestKind::SwitchInt { .. }
                 | TestKind::If
-                | TestKind::Len { .. }
+                | TestKind::SliceLen { .. }
                 | TestKind::Range { .. }
                 | TestKind::Eq { .. }
                 | TestKind::Deref { .. },
diff --git a/compiler/rustc_mir_build/src/builder/matches/mod.rs b/compiler/rustc_mir_build/src/builder/matches/mod.rs
index 424ff515ca5f..492a01aa27f1 100644
--- a/compiler/rustc_mir_build/src/builder/matches/mod.rs
+++ b/compiler/rustc_mir_build/src/builder/matches/mod.rs
@@ -1382,7 +1382,7 @@ enum TestKind<'tcx> {
     Range(Arc<PatRange<'tcx>>),
 
     /// Test that the length of the slice is `== len` or `>= len`.
-    Len { len: u64, op: BinOp },
+    SliceLen { len: u64, op: BinOp },
 
     /// Call `Deref::deref[_mut]` on the value.
     Deref {
diff --git a/compiler/rustc_mir_build/src/builder/matches/test.rs b/compiler/rustc_mir_build/src/builder/matches/test.rs
index 4a2823bf5d6b..853a7fafc728 100644
--- a/compiler/rustc_mir_build/src/builder/matches/test.rs
+++ b/compiler/rustc_mir_build/src/builder/matches/test.rs
@@ -52,7 +52,7 @@ impl<'a, 'tcx> Builder<'a, 'tcx> {
 
             TestableCase::Slice { len, variable_length } => {
                 let op = if variable_length { BinOp::Ge } else { BinOp::Eq };
-                TestKind::Len { len, op }
+                TestKind::SliceLen { len, op }
             }
 
             TestableCase::Deref { temp, mutability } => TestKind::Deref { temp, mutability },
@@ -312,7 +312,7 @@ impl<'a, 'tcx> Builder<'a, 'tcx> {
                 }
             }
 
-            TestKind::Len { len, op } => {
+            TestKind::SliceLen { len, op } => {
                 let usize_ty = self.tcx.types.usize;
                 let actual = self.temp(usize_ty, test.span);