diff --git a/tests/decodecorpus.c b/tests/decodecorpus.c
index f5cfd628..7d91a1c7 100644
--- a/tests/decodecorpus.c
+++ b/tests/decodecorpus.c
@@ -1316,30 +1316,31 @@ static size_t testDecodeWithDict(U32 seed, size_t dictSize)
             goto dictTestCleanup;
         }
     }
-
-    frame_t fr;
     {
-        size_t dictContentSize = dictSize-dictSize/4;
-        BYTE* const dictContent = fullDict+dictSize/4;
-        dictInfo const info = initDictInfo(1, dictContentSize, dictContent, dictID);
-        seed = generateFrame(seed, &fr, info);
-    }
-
-    {
-        ZSTD_DCtx* const dctx = ZSTD_createDCtx();
+        frame_t fr;
         {
-            size_t const returnValue = ZSTD_decompress_usingDict(dctx, DECOMPRESSED_BUFFER, MAX_DECOMPRESSED_SIZE,
-                                                   fr.dataStart, (BYTE*)fr.data - (BYTE*)fr.dataStart,
-                                                   fullDict, dictSize);
-            if (ZSTD_isError(returnValue)) {
-               errorDetected = returnValue;
-               goto dictTestCleanup;
-            }
+            size_t dictContentSize = dictSize-dictSize/4;
+            BYTE* const dictContent = fullDict+dictSize/4;
+            dictInfo const info = initDictInfo(1, dictContentSize, dictContent, dictID);
+            seed = generateFrame(seed, &fr, info);
         }
 
-        if (memcmp(DECOMPRESSED_BUFFER, fr.srcStart, (BYTE*)fr.src - (BYTE*)fr.srcStart) != 0) {
-            errorDetected = ERROR(corruption_detected);
-            goto dictTestCleanup;
+        {
+            ZSTD_DCtx* const dctx = ZSTD_createDCtx();
+            {
+                size_t const returnValue = ZSTD_decompress_usingDict(dctx, DECOMPRESSED_BUFFER, MAX_DECOMPRESSED_SIZE,
+                                                       fr.dataStart, (BYTE*)fr.data - (BYTE*)fr.dataStart,
+                                                       fullDict, dictSize);
+                if (ZSTD_isError(returnValue)) {
+                   errorDetected = returnValue;
+                   goto dictTestCleanup;
+                }
+            }
+
+            if (memcmp(DECOMPRESSED_BUFFER, fr.srcStart, (BYTE*)fr.src - (BYTE*)fr.srcStart) != 0) {
+                errorDetected = ERROR(corruption_detected);
+                goto dictTestCleanup;
+            }
         }
     }