diff --git a/src/calculate_projections.jl b/src/calculate_projections.jl
index 71ffe28..39a4746 100644
--- a/src/calculate_projections.jl
+++ b/src/calculate_projections.jl
@@ -45,9 +45,8 @@ function project_from_master_to_slave{T<:Number}(::Type{Val{:Seg2}}, xm::Vector{
     c = nom_c / denom_c
     d = b^2 - 4*a*c
     if d < 0
-        warn("Mortar2D.calculate_projections(): negative discriminant")
+        warn("Mortar2D.calculate_projections(): negative discriminant $d")
         warn("xm = $xm, xs1 = $xs1, xs2 = $xs2, ns1 = $ns1, ns2 = $ns2")
-        error("negative discriminant d=$d when calculating projection")
     end
     sols = [-b + sqrt(d), -b - sqrt(d)]/(2.0*a)
     return sols[indmin(abs.(sols))]
diff --git a/test/test_calculate_projections.jl b/test/test_calculate_projections.jl
index 6f1bead..1722866 100644
--- a/test/test_calculate_projections.jl
+++ b/test/test_calculate_projections.jl
@@ -29,6 +29,5 @@ end
     xs2 = [291.474, 359.169]
     ns1 = [-0.0765221, 0.997068]
     ns2 = [0.251347, 0.967897]
-    # FIXME: fails for unknown reason
-    # project_from_master_to_slave(Val{:Seg2}, xm, xs1, xs2, ns1, ns2)
+    @test_throws DomainError project_from_master_to_slave(Val{:Seg2}, xm, xs1, xs2, ns1, ns2)
 end