diff --git a/mlir/test/lit.cfg.py b/mlir/test/lit.cfg.py
--- a/mlir/test/lit.cfg.py
+++ b/mlir/test/lit.cfg.py
@@ -81,3 +81,11 @@
 # This option avoids to accidentally reuse variable across -LABEL match,
 # it can be explicitly opted-in by prefixing the variable name with $
 config.environment['FILECHECK_OPTS'] = "-enable-var-scope"
+
+
+# LLVM can be configured with an empty default triple
+# by passing ` -DLLVM_DEFAULT_TARGET_TRIPLE="" `.
+# This is how LLVM filters tests that require the host target
+# to be available for JIT tests.
+if config.target_triple:
+    config.available_features.add('default_triple')
diff --git a/mlir/test/mlir-cpu-runner/lit.local.cfg b/mlir/test/mlir-cpu-runner/lit.local.cfg
--- a/mlir/test/mlir-cpu-runner/lit.local.cfg
+++ b/mlir/test/mlir-cpu-runner/lit.local.cfg
@@ -2,4 +2,13 @@
 
 # FIXME: llvm orc does not support the COFF rtld.
 if sys.platform == 'win32':
-    config.unsupported = True
\ No newline at end of file
+    config.unsupported = True
+
+# Requires a non-empty default triple for these tests.
+# Passing ` -DLLVM_DEFAULT_TARGET_TRIPLE="" ` when the
+# host target isn't available is how LLVM filters
+# tests that require the host target to be available
+# for JIT tests.
+if 'default_triple' not in config.available_features:
+    config.unsupported = True
+