diff --git a/Jenkinsfile b/Jenkinsfile
index 73781ee890..905c035c71 100644
--- a/Jenkinsfile
+++ b/Jenkinsfile
@@ -559,7 +559,7 @@ pipeline {
                                     echo "CXXFLAGS+=-march=core2" > cmdstan/make/local
                                     echo "PRECOMPILED_HEADERS=false" >> cmdstan/make/local
                                     cd cmdstan; make clean-all; git show HEAD --stat; cd ..
-                                    CXX="$CXX" ./compare-optimizer.sh "--tests-file all.tests --num-samples=10 -j$PARALLEL" "--O1" "$(readlink -f ../bin/linux-stanc)"
+                                    CXX="$CXX" ./compare-optimizer.sh "--tests-file all.tests --num-samples=15 -j$PARALLEL" "--O1" "$(readlink -f ../bin/linux-stanc)"
                                 '''
                             }
 
diff --git a/test/integration/good/compiler-optimizations/cpp.expected b/test/integration/good/compiler-optimizations/cpp.expected
index 7276359713..8f77b2b423 100644
--- a/test/integration/good/compiler-optimizations/cpp.expected
+++ b/test/integration/good/compiler-optimizations/cpp.expected
@@ -31412,7 +31412,7 @@ stan::math::profile_map profiles__;
 static constexpr std::array<const char*, 7> locations_array__ =
   {" (found before start of program)",
   " (in 'lcm-fails.stan', line 6, column 2 to column 22)",
-  " (in 'lcm-fails.stan', line 9, column 2 to column 23)",
+  " (in 'lcm-fails.stan', line 10, column 2 to column 23)",
   " (in 'lcm-fails.stan', line 2, column 2 to column 17)",
   " (in 'lcm-fails.stan', line 3, column 8 to column 9)",
   " (in 'lcm-fails.stan', line 3, column 2 to column 18)",
diff --git a/test/integration/good/compiler-optimizations/cppO0.expected b/test/integration/good/compiler-optimizations/cppO0.expected
index 3a59716b09..545e7edfe6 100644
--- a/test/integration/good/compiler-optimizations/cppO0.expected
+++ b/test/integration/good/compiler-optimizations/cppO0.expected
@@ -19146,7 +19146,7 @@ stan::math::profile_map profiles__;
 static constexpr std::array<const char*, 7> locations_array__ =
   {" (found before start of program)",
   " (in 'lcm-fails.stan', line 6, column 2 to column 22)",
-  " (in 'lcm-fails.stan', line 9, column 2 to column 23)",
+  " (in 'lcm-fails.stan', line 10, column 2 to column 23)",
   " (in 'lcm-fails.stan', line 2, column 2 to column 17)",
   " (in 'lcm-fails.stan', line 3, column 8 to column 9)",
   " (in 'lcm-fails.stan', line 3, column 2 to column 18)",
diff --git a/test/integration/good/compiler-optimizations/cppO1.expected b/test/integration/good/compiler-optimizations/cppO1.expected
index 0dd4e7d22f..2231a9365c 100644
--- a/test/integration/good/compiler-optimizations/cppO1.expected
+++ b/test/integration/good/compiler-optimizations/cppO1.expected
@@ -21276,7 +21276,7 @@ stan::math::profile_map profiles__;
 static constexpr std::array<const char*, 7> locations_array__ =
   {" (found before start of program)",
   " (in 'lcm-fails.stan', line 6, column 2 to column 22)",
-  " (in 'lcm-fails.stan', line 9, column 2 to column 23)",
+  " (in 'lcm-fails.stan', line 10, column 2 to column 23)",
   " (in 'lcm-fails.stan', line 2, column 2 to column 17)",
   " (in 'lcm-fails.stan', line 3, column 8 to column 9)",
   " (in 'lcm-fails.stan', line 3, column 2 to column 18)",
diff --git a/test/integration/good/compiler-optimizations/lcm-fails.stan b/test/integration/good/compiler-optimizations/lcm-fails.stan
index 1cc4373768..f0a6e185fa 100644
--- a/test/integration/good/compiler-optimizations/lcm-fails.stan
+++ b/test/integration/good/compiler-optimizations/lcm-fails.stan
@@ -5,6 +5,7 @@ data {
 parameters {
   array[J] real theta;
 }
+
 model {
   y ~ normal(theta, 1);
 }