diff --git a/enzyme/test/Integration/Truncate/truncate-all.cpp b/enzyme/test/Integration/Truncate/truncate-all.cpp
index 863212852750..0e1fc11b6750 100644
--- a/enzyme/test/Integration/Truncate/truncate-all.cpp
+++ b/enzyme/test/Integration/Truncate/truncate-all.cpp
@@ -1,13 +1,26 @@
 // Baseline
-// RUN: if [ %llvmver -ge 12 ]; then [ "$(%clang -O3 %s -S -emit-llvm -o - %newLoadClangEnzyme -S -mllvm --enzyme-truncate-all="" | %lli -)" == "900000000.560000" ] ; fi
+
+// RUN: if [ %llvmver -ge 12 ]; then %clang -O3 %s -S -emit-llvm -o - %newLoadClangEnzyme -S -mllvm --enzyme-truncate-all="" | %lli - | FileCheck --check-prefix BASELINE %s; fi
+// BASELINE: 900000000.560000
+
 
 // Truncated
-// RUN: if [ %llvmver -ge 12 ]; then [ "$(%clang -O3 %s -S -emit-llvm -o - %newLoadClangEnzyme -S -mllvm --enzyme-truncate-all="64to32" | %lli -)" == "900000000.000000" ] ; fi
-// RUN: if [ %llvmver -ge 12 ]; then [ "$(%clang -O3 %s -S -emit-llvm -o - %newLoadClangEnzyme -S -mllvm --enzyme-truncate-all="11-52to8-23" | %lli -)" == "900000000.000000" ] ; fi
-// RUN: if [ %llvmver -ge 12 ]; then [ "$(%clang -O3 %s -S -emit-llvm -o - %newLoadClangEnzyme -S -mllvm --enzyme-truncate-all="11-52to3-7" | %lli -)" == "897581056.000000" ] ; fi
+
+// RUN: if [ %llvmver -ge 12 ]; then %clang -O3 %s -S -emit-llvm -o - %newLoadClangEnzyme -S -mllvm --enzyme-truncate-all="64to32" | %lli - | FileCheck --check-prefix TO_32 %s; fi
+// TO_32: 900000000.000000
+
+// RUN: if [ %llvmver -ge 12 ]; then %clang -O3 %s -S -emit-llvm -o - %newLoadClangEnzyme -S -mllvm --enzyme-truncate-all="11-52to8-23" | %lli - | FileCheck --check-prefix TO_28_23 %s; fi
+// TO_28_23: 900000000.000000
+
+// RUN: if [ %llvmver -ge 12 ]; then %clang -DENZYME_TEST_TO_MPFR -O3 %s -o %s.a.out %newLoadClangEnzyme -mllvm --enzyme-truncate-all="11-52to3-7" -lmpfr;  %s.a.out | FileCheck --check-prefix TO_3_7 %s; fi
+// TO_3_7: 897581056.000000
 
 #include <math.h>
 
+#ifdef ENZYME_TEST_TO_MPFR
+#include <enzyme/mpfr>
+#endif
+
 #include "../test_utils.h"
 
 #define N 10