diff --git a/Makefile.am b/Makefile.am
index 05d9f00c..d707a26b 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -54,6 +54,7 @@ vkd3d_shader_runners = \
 	tests/shader_runner_d3d12
 
 vkd3d_shader_tests = \
+	tests/cast-to-float.shader_test \
 	tests/conditional.shader_test \
 	tests/hlsl-array-dimension.shader_test \
 	tests/hlsl-bool-cast.shader_test \
@@ -266,6 +267,7 @@ tests_vkd3d_api_LDADD = libvkd3d.la @VULKAN_LIBS@
 tests_vkd3d_shader_api_LDADD = libvkd3d-shader.la
 SHADER_TEST_LOG_COMPILER = tests/shader_runner_d3d12
 XFAIL_TESTS = \
+	tests/cast-to-float.shader_test \
 	tests/conditional.shader_test \
 	tests/hlsl-array-dimension.shader_test \
 	tests/hlsl-bool-cast.shader_test \
diff --git a/tests/cast-to-float.shader_test b/tests/cast-to-float.shader_test
new file mode 100644
index 00000000..75822e52
--- /dev/null
+++ b/tests/cast-to-float.shader_test
@@ -0,0 +1,29 @@
+[pixel shader]
+
+float4 main(uniform int i, uniform uint u, uniform bool b, uniform half h) : sv_target
+{
+    return float4(((float)i) + 1.5, ((float)u) - 2.5, ((float)b) / 2, h);
+}
+
+[test]
+uniform 0 int -1
+uniform 1 uint 3
+uniform 2 int -2
+uniform 3 float 0.5
+draw quad
+probe all rgba (0.5, 0.5, 0.5, 0.5)
+
+[pixel shader]
+
+float4 main() : sv_target
+{
+    int i = -1;
+    uint u = 3;
+    bool b = true;
+    half h = 0.5;
+    return float4(((float)i) + 1.5, ((float)u) - 2.5, ((float)b) / 2, h);
+}
+
+[test]
+draw quad
+probe all rgba (0.5, 0.5, 0.5, 0.5)
diff --git a/tests/shader_runner_d3d12.c b/tests/shader_runner_d3d12.c
index 2221c0f8..d5c0380e 100644
--- a/tests/shader_runner_d3d12.c
+++ b/tests/shader_runner_d3d12.c
@@ -242,11 +242,38 @@ static void parse_test_directive(struct shader_context *context, const char *lin
             }
             memcpy(context->uniforms + offset, &v, sizeof(v));
         }
+        else if (match_string(line, "float", &line))
+        {
+            float f;
+
+            if (sscanf(line, "%f", &f) < 1)
+                goto err;
+            if (offset + 1 > context->uniform_count)
+            {
+                context->uniform_count = offset + 1;
+                context->uniforms = realloc(context->uniforms, context->uniform_count * sizeof(*context->uniforms));
+            }
+            memcpy(context->uniforms + offset, &f, sizeof(f));
+        }
+        else if (match_string(line, "int", &line))
+        {
+            int i;
+
+            if (sscanf(line, "%i", &i) < 1)
+                goto err;
+            if (offset + 1 > context->uniform_count)
+            {
+                context->uniform_count = offset + 1;
+                context->uniforms = realloc(context->uniforms, context->uniform_count * sizeof(*context->uniforms));
+            }
+            memcpy(context->uniforms + offset, &i, sizeof(i));
+        }
         else if (match_string(line, "uint", &line))
         {
             unsigned int u;
 
-            sscanf(line, "%u", &u);
+            if (sscanf(line, "%u", &u) < 1)
+                goto err;
             if (offset + 1 > context->uniform_count)
             {
                 context->uniform_count = offset + 1;