diff --git a/tests/problem/test_param_broadcast.h b/tests/problem/test_param_broadcast.h
index 377121a..c64d64b 100644
--- a/tests/problem/test_param_broadcast.h
+++ b/tests/problem/test_param_broadcast.h
@@ -192,8 +192,7 @@ const char *test_const_sum_scalar_mult(void)
 
     problem_init_derivatives(prob);
 
-    /* point for evaluating */
-    double x_vals[1] = {4.0};
+    double x_vals[6] = {4.0, 0.0, 0.0, 0.0, 0.0, 0.0};
 
     problem_constraint_forward(prob, x_vals);
     double constrs[1] = {6.0 * 4.0};
@@ -226,8 +225,7 @@ const char *test_param_sum_scalar_mult(void)
     problem_register_params(prob, param_nodes, 1);
     problem_init_derivatives(prob);
 
-    /* point for evaluating */
-    double x_vals[1] = {4.0};
+    double x_vals[6] = {4.0, 0.0, 0.0, 0.0, 0.0, 0.0};
 
     problem_constraint_forward(prob, x_vals);
     double constrs[1] = {6.0 * 4.0};
diff --git a/tests/wsum_hess/composite/test_chain_rule_wsum_hess.h b/tests/wsum_hess/composite/test_chain_rule_wsum_hess.h
index d8b943b..296dd3c 100644
--- a/tests/wsum_hess/composite/test_chain_rule_wsum_hess.h
+++ b/tests/wsum_hess/composite/test_chain_rule_wsum_hess.h
@@ -300,13 +300,13 @@ const char *test_wsum_hess_AX_BX_multiply(void)
 
 const char *test_wsum_hess_multiply_deep_composite(void)
 {
-    double u_vals[4] = {1.0, 2.0, 3.0, 4.0};
+    double u_vals[8] = {1.0, 2.0, 3.0, 4.0, 5.0, 6.0, 7.0, 8.0};
     double w[4] = {1.1, 2.2, 3.3, 4.4};
 
     CSR_matrix *A = new_csr_random(2, 2, 1.0);
     CSR_matrix *B = new_csr_random(2, 2, 1.0);
     expr *X = new_variable(2, 2, 0, 8);
-    expr *Y = new_variable(2, 2, 0, 8);
+    expr *Y = new_variable(2, 2, 4, 8);
     expr *AX = new_left_matmul(NULL, X, A);
     expr *BY = new_left_matmul(NULL, Y, B);
     expr *sin_AX = new_sin(AX);