--- a/liboctave/fMatrix.cc
+++ b/liboctave/fMatrix.cc
@@ -3147,19 +3147,19 @@
 // matrix by matrix -> matrix operations
 
 /* Simple Dot Product, Matrix-Vector and Matrix-Matrix Unit tests
-%!assert([1 2 3] * [ 4 ; 5 ; 6], 32, 1e-14)
-%!assert([1 2 ; 3 4 ] * [5 ; 6], [17 ; 39 ], 1e-14)
-%!assert([1 2 ; 3 4 ] * [5 6 ; 7 8], [19 22; 43 50], 1e-14)
+%!assert(single([1 2 3]) * single([ 4 ; 5 ; 6]), single(32), 5e-7)
+%!assert(single([1 2 ; 3 4 ]) * single([5 ; 6]), single([17 ; 39 ]), 5e-7)
+%!assert(single([1 2 ; 3 4 ]) * single([5 6 ; 7 8]), single([19 22; 43 50]), 5e-7)
 */
 
 /* Test some simple identities
 %!shared M, cv, rv
-%! M = randn(10,10);
-%! cv = randn(10,1);
-%! rv = randn(1,10);
-%!assert([M*cv,M*cv],M*[cv,cv],1e-14)
-%!assert([rv*M;rv*M],[rv;rv]*M,1e-14)
-%!assert(2*rv*cv,[rv,rv]*[cv;cv],1e-14)
+%! M = single(randn(10,10));
+%! cv = single(randn(10,1));
+%! rv = single(randn(1,10));
+%!assert([M*cv,M*cv],M*[cv,cv],5e-7)
+%!assert([rv*M;rv*M],[rv;rv]*M,5e-7)
+%!assert(2*rv*cv,[rv,rv]*[cv;cv],5e-7)
 */
 
 static const char *