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-rw-r--r--src/tools/compiletest/src/runtest.rs2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/tools/compiletest/src/runtest.rs b/src/tools/compiletest/src/runtest.rs
index 60a0d8f0b86..aa4510746fd 100644
--- a/src/tools/compiletest/src/runtest.rs
+++ b/src/tools/compiletest/src/runtest.rs
@@ -2041,7 +2041,7 @@ actual:\n\
 
     /// Directory where incremental work products are stored.
     fn incremental_dir(&self) -> PathBuf {
-        self.output_base_name().with_extension("incremental")
+        self.output_base_name().with_extension("inc")
     }
 
     fn run_rmake_test(&self) {