diff --git a/reader/src/test/java/io/github/dfa1/vortex/reader/VortexHttpReaderIT.java b/reader/src/test/java/io/github/dfa1/vortex/reader/VortexHttpReaderIT.java
index 3a9db8e2..da3c087b 100644
--- a/reader/src/test/java/io/github/dfa1/vortex/reader/VortexHttpReaderIT.java
+++ b/reader/src/test/java/io/github/dfa1/vortex/reader/VortexHttpReaderIT.java
@@ -2,6 +2,7 @@
 
 import io.github.dfa1.vortex.core.DType;
 import io.github.dfa1.vortex.core.PType;
+import io.github.dfa1.vortex.core.VortexException;
 import io.github.dfa1.vortex.core.VortexFormat;
 import io.github.dfa1.vortex.reader.array.ListArray;
 import io.github.dfa1.vortex.reader.array.ListViewArray;
@@ -15,6 +16,7 @@
 import java.util.List;
 
 import static org.assertj.core.api.Assertions.assertThat;
+import static org.assertj.core.api.Assertions.assertThatThrownBy;
 
 /// Integration test: reads real Vortex files from the public S3 compatibility bucket
 /// via HTTP Range requests and validates structure + data.
@@ -23,7 +25,7 @@
 @Tag("integration")
 class VortexHttpReaderIT {
 
-    private static final URI BASE = URI.create("https://vortex-compat-fixtures.s3.amazonaws.com/v0.72.0/arrays/");
+    private static final URI BASE = URI.create("https://vortex-compat-fixtures.s3.amazonaws.com/v0.75.0/arrays/");
 
     private static final URI TPCH_LINEITEM = BASE.resolve("tpch_lineitem.compact.vortex");
 
@@ -78,13 +80,71 @@ void scan_forVortex_decodesAllRows() throws Exception {
         assertThat(totalRows).isGreaterThan(0);
     }
 
-    // vortex.masked / vortex.patched / vortex.variant: IDs known, decoders not yet implemented.
-    // No S3 fixture exists in v0.72.0 — enable these tests once fixtures are published.
+    // Smoke test: every published encoding fixture must open and decode all its rows.
+    // Catches upstream wire-format drift across the full encoding set in one place; the
+    // structural tests below (for/list/listview) assert shape for the trickier layouts.
+    // Excludes the multi-MB clickbench/tpch fixtures (covered by dedicated tests) to keep
+    // this fast over HTTP.
+    @ParameterizedTest
+    @ValueSource(strings = {
+            "alp.vortex", "alprd.vortex", "bitpacked.vortex", "booleans.vortex", "bytebool.vortex",
+            "chunked.vortex", "constant.vortex", "datetime.vortex", "datetimeparts.vortex",
+            "decimal.vortex", "decimal_byte_parts.vortex", "dict.vortex", "fixed_size_list.vortex",
+            "fsst.vortex", "null.vortex", "pco.vortex", "primitives.vortex", "rle.vortex",
+            "runend.vortex", "sequence.vortex", "sparse.vortex", "struct_nested.vortex",
+            "varbin.vortex", "varbinview.vortex", "zigzag.vortex"
+            // zstd.vortex omitted: dictionary-compressed, unsupported by the pure-Java decoder
+            // (see scan_zstdVortex_rejectsDictionaryCompression).
+    })
+    void scan_publishedFixture_decodesAllRows(String fixture) throws Exception {
+        // Given
+        URI uri = BASE.resolve(fixture);
+
+        // When
+        long totalRows = 0;
+        try (var sut = VortexHttpReader.open(uri);
+             var iter = sut.scan(ScanOptions.all())) {
+            while (iter.hasNext()) {
+                try (var c = iter.next()) {
+                    totalRows += c.rowCount();
+                }
+            }
+        }
+
+        // Then
+        assertThat(totalRows).isGreaterThan(0);
+    }
+
+    // The published zstd.vortex fixture is dictionary-compressed; the pure-Java decoder has no
+    // Zstd dictionary support and must fail fast with a clear message rather than mis-decode.
+    // Tracked by https://github.com/dfa1/vortex-java/issues/104 (upstream airlift/aircompressor#119).
+    @Test
+    void scan_zstdVortex_rejectsDictionaryCompression() throws Exception {
+        // Given
+        URI uri = BASE.resolve("zstd.vortex");
+
+        // When / Then
+        try (var sut = VortexHttpReader.open(uri);
+             var iter = sut.scan(ScanOptions.all())) {
+            assertThatThrownBy(() -> {
+                while (iter.hasNext()) {
+                    try (var c = iter.next()) {
+                        c.rowCount();
+                    }
+                }
+            })
+                    .isInstanceOf(VortexException.class)
+                    .hasMessageContaining("dictionary-compressed Zstd segments are not supported");
+        }
+    }
+
+    // vortex.masked / vortex.patched / vortex.variant: decoders implemented, but no S3 fixture
+    // is published (still absent at v0.75.0) — enable this test once fixtures exist upstream.
 
-    @Disabled("no S3 fixture in v0.72.0")
+    @Disabled("no S3 fixture through v0.75.0")
     @ParameterizedTest
     @ValueSource(strings = {"masked.vortex", "patched.vortex", "variant.vortex"})
-    void scan_unimplementedEncoding_decodesAllRows(String fixture) throws Exception {
+    void scan_unpublishedFixture_decodesAllRows(String fixture) throws Exception {
         // Given
         URI uri = BASE.resolve(fixture);