diff --git a/pipeline/config.yaml b/pipeline/config.yaml
index df7b803fe..2d8d27d44 100644
--- a/pipeline/config.yaml
+++ b/pipeline/config.yaml
@@ -61,11 +61,11 @@ test-sets:
     original: eo/eo-runtime/src/test/eo/org/eolang/bytes-tests.eo
     yaml: pipeline/eo-yaml/bytes-tests.yaml
     filtered: pipeline/eo-filtered/bytes-tests.eo
-    # exclude:
-    #   - counts-size-of-bytes
-    #   - size-of-part-is-correct
+    exclude:
+      - counts-size-of-bytes
+      - size-of-part-is-correct
     #   - takes-part-of-bytes
-    #   - written-in-several-lines
+      - written-in-several-lines
     #   - and-neg-bytes-as-number-with-leading-zeroes
     #   - and-neg-bytes-as-number-without-leading-zeroes
     #   - bitwise-works
@@ -78,7 +78,7 @@ test-sets:
     #   - throws-on-bytes-of-wrong-size-as-i64
     #   - throws-on-bytes-of-wrong-size-as-number
     #   - xor-neg-bytes-as-number-without-leading-zeroes
-    #   - left-with-even-neg
+      - left-with-even-neg
   phi:
     initial: pipeline/phi-initial/bytes-tests.phi
     normalized: pipeline/phi-normalized/bytes-tests.phi
@@ -188,7 +188,7 @@ test-sets:
     original: eo/eo-runtime/src/test/eo/org/eolang/i64-tests.eo
     yaml: pipeline/eo-yaml/i64-tests.yaml
     filtered: pipeline/eo-filtered/i64-tests.eo
-    # exclude:
+    exclude:
     #   - i64-div-less-than-i64-one
     #   - i64-eq-false
     #   - i64-eq-true
@@ -209,7 +209,7 @@ test-sets:
     #   - i64-zero-eq-to-i64-zero
     #   - throws-on-converting-to-i32-if-out-of-bounds
     #   - throws-on-division-i64-by-i64-zero
-    #   - negative-i64-to-i32-and-back
+      - negative-i64-to-i32-and-back
   phi:
     initial: pipeline/phi-initial/i64-tests.phi
     normalized: pipeline/phi-normalized/i64-tests.phi
@@ -337,13 +337,13 @@ test-sets:
     original: eo/eo-runtime/src/test/eo/org/eolang/nan-tests.eo
     yaml: pipeline/eo-yaml/nan-tests.yaml
     filtered: pipeline/eo-filtered/nan-tests.eo
-    # exclude:
+    exclude:
     #   - nan-is-nan
     #   - nan-is-not-finite
     #   - nan-is-not-integer
     #   - nan-neg-is-nan
     #   - nan-not-eq-nan
-    #   - nan-as-bytes-is-bytes-of-zero-div-zero
+      - nan-as-bytes-is-bytes-of-zero-div-zero
   phi:
     initial: pipeline/phi-initial/nan-tests.phi
     normalized: pipeline/phi-normalized/nan-tests.phi
@@ -518,19 +518,19 @@ test-sets:
     original: eo/eo-runtime/src/test/eo/org/eolang/string-tests.eo
     yaml: pipeline/eo-yaml/string-tests.yaml
     filtered: pipeline/eo-filtered/string-tests.eo
-    # exclude:
+    exclude:
     #   - slice-foreign-literals
     #   - slice-foreign-literals-2
     #   - slice-from-start
     #   - slice-from-the-end
     #   - slice-in-the-middle
-    #   - throws-on-slicing-end-below-start
+      - throws-on-slicing-end-below-start
     #   - throws-on-slicing-end-greater-actual
     #   - calculates-length-of-spaces-only
     #   - reads-the-length
-    #   - slice-escape-sequences-line-break
-    #   - slice-escape-sequences-unicode
-    #   - throws-on-slicing-start-below-zero
+      - slice-escape-sequences-line-break
+      - slice-escape-sequences-unicode
+      - throws-on-slicing-start-below-zero
   phi:
     initial: pipeline/phi-initial/string-tests.phi
     normalized: pipeline/phi-normalized/string-tests.phi