diff --git a/tests/meson.build b/tests/meson.build
index 36fa3a7..0fb7b3a 100644
--- a/tests/meson.build
+++ b/tests/meson.build
@@ -14,6 +14,8 @@ endif
 ## Test cases
 
 testcases = [
+  ['prefixes', 'prefixes.txt'],
+
   ['enter', 'decode-enter.sh'],
   ['imul', 'decode-imul.sh'],
   ['inc', 'decode-inc.sh'],
diff --git a/tests/prefixes.txt b/tests/prefixes.txt
new file mode 100644
index 0000000..71fda57
--- /dev/null
+++ b/tests/prefixes.txt
@@ -0,0 +1,13 @@
+decode   90                             [NOP]
+decode   2e90                           [cs:NOP]
+decode   2e2e90                         [cs:NOP]
+decode   2e2690                         [es:NOP]
+decode   262e90                         [cs:NOP]
+decode   266590                         [gs:NOP]
+decode   652690                         [es:NOP]
+decode   0f10c1                         [SSE_MOVUPS reg16:r0 reg16:r1]
+decode   660f10c1                       [SSE_MOVUPD reg16:r0 reg16:r1]
+decode   f2660f10c1                     [SSE_MOVSD reg8:r0 reg8:r1]
+decode   f3660f10c1                     [SSE_MOVSS reg4:r0 reg4:r1]
+decode   f3f2660f10c1                   [SSE_MOVSD reg8:r0 reg8:r1]
+decode   f266f3660f10c1                 [SSE_MOVSS reg4:r0 reg4:r1]